UI zooming when rotating or entering text

HA app on iOS fully up-to-date, versions are irrelevant as this has been going on for me for literal years.

Every time I rotate my device or tap a text field, HA UI zooms in - and never zooms back out.

Here’s a video

I do keep the view at 85% zoom but it doesn’t make any difference. Nor does SwiftKey or the default system keyboard.

Any tips? Thanks!