iOS 26 WKWebView STScreenTimeConfigurationObserver KVO Crash

UI Frameworks UIKit WebKit

Created Dec ’25

Replies 18

Boosts 17

Views 2.3k

Participants 15

Fatal Exception: NSInternalInconsistencyException Cannot remove an observer <WKWebView 0x135137800> for the key path "configuration.enforcesChildRestrictions" from <STScreenTimeConfigurationObserver 0x13c6d7460>, most likely because the value for the key "configuration" has changed without an appropriate KVO notification being sent. Check the KVO-compliance of the STScreenTimeConfigurationObserver [class.] 截屏2025-12-11 13.54.31.png

I noticed that on iOS 26, WKWebView registers STScreenTimeConfigurationObserver, Is this an iOS 26 system issue? What should I do?

截屏2025-12-09 17.12.06.png

Boost

RodolfoGS OP

Mar ’26

Same issue still present in iOS 26.3.1 and iPad OS 26.3.1

zhangxiaoye OP

iOS 26.4 系统也会出现,已经修复了吗？

DTS Engineer OP

Apple

Thanks everyone for posting your bug numbers here. I can see they are all in-process and under investigation. I related all of the bugs so they can be found together by engineers looking at any one of them. Please continue testing your software in system software updates (and betas) and updating your bug reports with the results as new updates are made available.