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mazunin-v-jb
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svastven
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ASalavei
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As we were relying on `didMoveToWindow()` and `layoutSubviews()` to configure components, MetalLayer may receive a call to `layoutSubviews()` and, consequently, fire a draw call before the ComposeSceneMediator is properly initialised. Moving the synchronous frame draw to the `drawRect` fixes the issue. Note: `drawRect` does not work when used in `MetalView` (a view that uses `CAMetalLayer`). Fixes https://youtrack.jetbrains.com/issue/CMP-9471/iOS-Flash-on-toggling-between-views ## Release Notes ### Fixes - iOS - Fix issue where the first frame may not be rendered on Compose container appearance
siarb
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Jan 19, 2026
As we were relying on `didMoveToWindow()` and `layoutSubviews()` to configure components, MetalLayer may receive a call to `layoutSubviews()` and, consequently, fire a draw call before the ComposeSceneMediator is properly initialised. Moving the synchronous frame draw to the `drawRect` fixes the issue. Note: `drawRect` does not work when used in `MetalView` (a view that uses `CAMetalLayer`). Fixes https://youtrack.jetbrains.com/issue/CMP-9471/iOS-Flash-on-toggling-between-views ## Release Notes ### Fixes - iOS - Fix issue where the first frame may not be rendered on Compose container appearance
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As we were relying on
didMoveToWindow()andlayoutSubviews()to configure components, MetalLayer may receive a call tolayoutSubviews()and, consequently, fire a draw call before the ComposeSceneMediator is properly initialised. Moving the synchronous frame draw to thedrawRectfixes the issue. Note:drawRectdoes not work when used inMetalView(a view that usesCAMetalLayer).Fixes https://youtrack.jetbrains.com/issue/CMP-9471/iOS-Flash-on-toggling-between-views
Release Notes
Fixes - iOS