Problem with hidden components on iOS

I created an app that works fine on Android. For the iOS version, I have the impression that there is a problem with components that I set to hidden and then visible. I lose the defined dimensions (height, width, etc.) and the buttons are no longer active. A light flash confirms that they are clicked but nothing happens.
Should App Inventor fix its conversion to iOS or should I find a workaround for this issue in my program?

This is likely a bug on our end. If you have a simple app to test it, we can run some tests on our end.

Thank you for your reply. I just solved the button problem.
The action was not working because the name of an image file had been mysteriously replaced by another.
For the preservation of formats, I did not find an explanation. It was perhaps another problem in my code. I worked around the problem by displaying another object that, instead of hiding the first one, puts it outside the screen, and it works. Objects are HorizontalArrangement.