topColumnForCollapsingToProposedTopColumn not called on iOS 26.1

I've updated test device to iOS 26.1 (23B5059e) and it looks like topColumnForCollapsingToProposedTopColumn isn't being called.

The code has been fine up until iOS 26.1. Is that a UIKit issue or shall I find another way to get my splitview to show the primary view as default?

Answered by Frameworks Engineer in 861959022

This is unexpected. Please may you file a feedback report with a sample project exhibiting this issue.

This is unexpected. Please may you file a feedback report with a sample project exhibiting this issue.

topColumnForCollapsingToProposedTopColumn not called on iOS 26.1
 
 
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