Anything pasted in UI Desiger subviews gets placed at highest level - not in current subview context

[GeeseBeGone]

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Steps to recreate:

Start a new "Script with UI" Use the "+" to add custom view. Enter the custom view by tapping it and then selecting "subviews" Use the "+" to create a button. Longpress the button and select "copy" Longpress a blank area in the current subview, select "paste"

The button will not paste in the current subview context. Hit the "x" in the upper left of the designer to return to the main view. The button has been pasted here.

This appears to happen regardless how I copy/paste (tap menus as well as CMD-C, CMD-V via external keyboard produce the same results).

Using Pythonista 3.3(330025) on 5thGen iPad Pro. iOS 15.2 Also occurs on iphoneX iOS 15.2