Hi,
We're experiencing a WKWebView issue where the screen intermittently turns pure magenta (#FF00FF) in our production iOS app. After investigation, we traced this to WebKit's internal WKCompositingView.mm where [UIColor magentaColor] is used as a pending state indicator when coverView.hidden == NO.
This matches rdar://163597990 / WebKit Bug 303157 ("Magenta flash when loading page"), which was fixed in commit 303720@main on 2025-12-01 via PR #54499.
My question is simple: which iOS/Safari release includes this fix?
We're on iOS 26.3 and still seeing the issue. We need to know:
- Is the fix already in iOS 26.3? (If so, there may be another unfixed code path)
- If not, which upcoming iOS version will include it?
Our environment
- iOS 26.3, iPhone 15 Pro Max
- WKWebView with complex web content
- App codebase contains zero magenta color usage — this is purely from WebKit
Related
- rdar://163597990
- Bug 303157 — RESOLVED FIXED
- Bug 230531 — "Pages render as magenta after being in background"
- PR #54499 — Merged to main 2025-12-01
Any information about the release timeline would be very helpful. Thanks!