Bug with top/bottom of screen moving

Apologies if this has been covered else where but I (and others using different phones) notice that the app screen seems to ‘expand’ top and/or bottom so that the top three bar icon and/or the bottom icons get partially cut off.
The app is always fine when you initially open it but, especially if you rotate your phone to landscape and back it happens.
Video attached of it happening.
I have seen this happen on a few of the apps I have created so I don’t think it’s app specific.

The only way of fixing it is to close the app and re-open but obviously not the best solution for your general user!

I don’t know if this is a Glide or Safari issue?