I have opened the issue at stackoverflow. I 'll report it at feedback assistant tomorrow.

Is there an another issue with this solution. Changing between two versions of NavigationSplitView, the scroll position is different and the transition isn't smooth.

MacBook prin 2008 mid 13.3" (intel)

Thank you very much for you post. I tried iPhone 8 simulator, which has problem too but never try iPhone 7 simulator. You found a way to try our Apps without a device. :( edited: Unfortunately i had kernel panic running iPhone 7 simulator.

I tried iPhone simulator and I have the same issue.

Check this thread. https://developer.apple.com/forums/thread/702631 I have the same issue with others for months. I submit a feedback assistant for this issue with id:  FB10069968. I don't run  sudo sysdiagnose or  xcrun simctl diagnose but MacBook collected logs automatic. I will try to reproduce the issue and run these commands. It seems only intel Mac have the issue.

Unfortunately, I had two kernel panic today too