OK, I finally figure out that's my problem with setting the size classes for iPhone 14 Pro Max landscape. Using Any width, compact height works. But there is an error in HIG documentation for iPhone 14 and iPhone 14 Pro landscape size classes. It should be fixed.

I updated to the new beta 4 (23A5297m), the problem is still unchanged. And I found that, if the label text has an emoji, it will apply the dark mode color correctly on the UISplitViewController's Primary View. It's strange. I submit the feedback FB19067917 for it.

On Beta 5, the UIColor.label on the SplitViewController's primary view becomes gray(transparent), not white in dark mode. However, adding an emoji will make it white. This problem remains unresolved!

On beta 6, this problem is finally fixed. Thank you!

It was working fine on Xcode 26 RC and with iOS 26 RC devices yesterday. Today I upgraded to Xcode 26 (17A324), then this problem occurred. Deleting all files from ~/Library/Developer/Xcode/UserData/Provisioning Profiles helps.

I submited a feedback for this issue. FB20706282 It's serious problem for all apps. Hopefully can fix it.

On iOS 26 beta 4, those problem are not fixed yet!

On iOS 26 RC, this serious bug still exists!

Those two problems remain unfixed in iOS 26.1 and iOS 26.2 beta. No one checked out this problem?

I’ve been reporting this problem for over a month, yet the Apple team still hasn’t fixed it or provided any response. https://developer.apple.com/forums/thread/804175

This issue remains unresolved in iOS 26.2 beta 3, and it appears to be even worse. This is the screenshot when switched to dark mode on the control center while the popover is appearing. I have reported for over a month, and have received no response yet!

The problem is still on iOS 26.2 RC. Is there no plan to fix that?