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[Windows][MultiView] hitch/freeze when interacting with child window's title bar

a: desktopRunning on desktopRunning on desktop

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

found in release: 3.37Found to occur in 3.37Found to occur in 3.37

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

platform-windowsBuilding on or for Windows specificallyBuilding on or for Windows specifically

team-windowsOwned by the Windows platform teamOwned by the Windows platform team

Status: Open.

#176480 In flutter/flutter;

· bufffun opened on Oct 3, 2025

Extremely slow video selection with MOV format on iOS devices and Simulator

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

found in release: 3.36Found to occur in 3.36Found to occur in 3.36

found in release: 3.37Found to occur in 3.37Found to occur in 3.37

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

p: image_pickerThe Image Picker plugin.The Image Picker plugin.

packageflutter/packages repository. See also p: labels.flutter/packages repository. See also p: labels.

perf: speedPerformance issues related to (mostly rendering) speedPerformance issues related to (mostly rendering) speed

platform-iosiOS applications specificallyiOS applications specifically

team-iosOwned by iOS platform teamOwned by iOS platform team

Status: Open.

#176355 In flutter/flutter;

· Harunn33 opened on Oct 1, 2025

Flutter 3.35 freezes when switching to full screen mode on the Windows platform

a: desktopRunning on desktopRunning on desktop

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

c: regressionIt was better in the past than it is nowIt was better in the past than it is now

f: material designflutter/packages/flutter/material repository.flutter/packages/flutter/material repository.

found in release: 3.35Found to occur in 3.35Found to occur in 3.35

found in release: 3.37Found to occur in 3.37Found to occur in 3.37

frameworkflutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

perf: memoryPerformance issues related to memoryPerformance issues related to memory

platform-windowsBuilding on or for Windows specificallyBuilding on or for Windows specifically

team-windowsOwned by the Windows platform teamOwned by the Windows platform team

workaround availableThere is a workaround available to overcome the issueThere is a workaround available to overcome the issue

Status: Open.

#176088 In flutter/flutter;

· CarGuo opened on Sep 26, 2025

Severe debugging lag on physical iPhone 12 device (iOS 26) with Flutter 3.35.4 via Xcode 26

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

e: device-specificOnly manifests on certain devicesOnly manifests on certain devices

e: OS-version specificAffects only some versions of the relevant operating systemAffects only some versions of the relevant operating system

platform-iosiOS applications specificallyiOS applications specifically

team-iosOwned by iOS platform teamOwned by iOS platform team

Status: Open.

#175962 In flutter/flutter;

· igbokwenu opened on Sep 24, 2025

3-4 frame latency on 120fps iPad

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

e: device-specificOnly manifests on certain devicesOnly manifests on certain devices

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-iosiOS applications specificallyiOS applications specifically

team-iosOwned by iOS platform teamOwned by iOS platform team

triaged-iosTriaged by iOS platform teamTriaged by iOS platform team

Status: Open.

#175790 In flutter/flutter;

· filiph opened on Sep 22, 2025

Android slow cold start & slow warm start caused by Impeller

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

e: device-specificOnly manifests on certain devicesOnly manifests on certain devices

e: impellerImpeller rendering backend issues and features requestsImpeller rendering backend issues and features requests

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

P2Important issues not at the top of the work listImportant issues not at the top of the work list

perf: startupPerformance issues related to app startup timePerformance issues related to app startup time

platform-androidAndroid applications specificallyAndroid applications specifically

slimpellerEngine binary size reduction. go/slimpellerEngine binary size reduction. go/slimpeller

team-engineOwned by Engine teamOwned by Engine team

triaged-engineTriaged by Engine teamTriaged by Engine team

Status: Open.

#175577 In flutter/flutter;

· RelappsStudio opened on Sep 18, 2025

Flinging in PageView depends on rendering time, leading to inconsistent behaviour

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

f: gesturesflutter/packages/flutter/gestures repository.flutter/packages/flutter/gestures repository.

found in release: 3.35Found to occur in 3.35Found to occur in 3.35

found in release: 3.36Found to occur in 3.36Found to occur in 3.36

frameworkflutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

perf: speedPerformance issues related to (mostly rendering) speedPerformance issues related to (mostly rendering) speed

team-frameworkOwned by Framework teamOwned by Framework team

Status: Open.

#174904 In flutter/flutter;

· Eerey opened on Sep 3, 2025

Merged platform thread forces Android crash when interacting with UI during hot reload

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

P2Important issues not at the top of the work listImportant issues not at the top of the work list

t: hot reloadReloading code during "flutter run"Reloading code during "flutter run"

team-engineOwned by Engine teamOwned by Engine team

toolAffects the "flutter" command-line tool. See also t: labels.Affects the "flutter" command-line tool. See also t: labels.

triaged-engineTriaged by Engine teamTriaged by Engine team

Status: Open.

#174818 In flutter/flutter;

· auradigitaldev opened on Sep 2, 2025

Visibility widget still processes and renders child when visible=false

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

frameworkflutter/packages/flutter repository. See also f: labels.flutter/packages/flutter repository. See also f: labels.

team-frameworkOwned by Framework teamOwned by Framework team

Status: Open.

#174785 In flutter/flutter;

· PeacefulBlack opened on Sep 1, 2025

iOS blur causes constant repaints; CPU ~80% when idle

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

found in release: 3.35Found to occur in 3.35Found to occur in 3.35

found in release: 3.36Found to occur in 3.36Found to occur in 3.36

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

P2Important issues not at the top of the work listImportant issues not at the top of the work list

perf: memoryPerformance issues related to memoryPerformance issues related to memory

platform-iosiOS applications specificallyiOS applications specifically

team-engineOwned by Engine teamOwned by Engine team

triaged-engineTriaged by Engine teamTriaged by Engine team

Status: Open.

#174388 In flutter/flutter;

· Nazareneism opened on Aug 25, 2025

[Android][3.35.1]It takes a long time to LinkProgram with impeller opengles backend when first time PlatformViewAndroid::NotifyCreated is called

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

e: impellerImpeller rendering backend issues and features requestsImpeller rendering backend issues and features requests

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

P2Important issues not at the top of the work listImportant issues not at the top of the work list

platform-androidAndroid applications specificallyAndroid applications specifically

team-engineOwned by Engine teamOwned by Engine team

triaged-engineTriaged by Engine teamTriaged by Engine team

Status: Open.

#173955 In flutter/flutter;

· littleGnAl opened on Aug 18, 2025

[Impeller]: Performance drop using <code>BlendMode.multiply</code>

c: performanceRelates to speed or footprint issues (see "perf:" labels)Relates to speed or footprint issues (see "perf:" labels)

e: impellerImpeller rendering backend issues and features requestsImpeller rendering backend issues and features requests

engineflutter/engine related. See also e: labels.flutter/engine related. See also e: labels.

found in release: 3.33Found to occur in 3.33Found to occur in 3.33

found in release: 3.35Found to occur in 3.35Found to occur in 3.35

has reproducible stepsThe issue has been confirmed reproducible and is ready to work onThe issue has been confirmed reproducible and is ready to work on

P2Important issues not at the top of the work listImportant issues not at the top of the work list

team-engineOwned by Engine teamOwned by Engine team

triaged-engineTriaged by Engine teamTriaged by Engine team

Status: Open.

#173828 In flutter/flutter;

· RocksteadyDog opened on Aug 15, 2025