Something doesn’t seem right with your settings for the Collection Item. It doesn’t have any height set, so that may be causing some issues.
I recorded a way to clean up the structure a little, see here:
This seems to help in preview mode, though I can’t easily test if this fixes the issue on Android.
Another thing to factor in with Android is the default nav bar (as you can see at the bottom of your screenshot) can affect things like VH settings. You’re using percentages for height, so that may be causing issues too.