Android Rendering Problem with simple tab layout

Hello to everybody, here is the problem.
By creating a tab project, and by adding some buttons / button bar it seems to be all fine when using the online emulator from creator, or even when after exporting the project, by running it with the “serve” command locally. But then, once compiled for Android, what i see is that some of those buttons appear to be wider than the screen itself, making it as if you could scroll horizontally, which is weird.
After this, if i click on the -too-large-button, it resizes itself to the right width.
After this, by changing tabs it keeps the right measurements, until i close the app and launch it again, and again the rendering problem is there.

here the link to the creator emulator:

and here the link to the video to show the issue to better understand: