Samsung Galaxy Tab S7 - screen rotation not retained when Auto-rotate is disabled

I have a Samsung Galaxy Tab S7, which is happily running e/OS/

I like to use it in a non-standard rotation

I rotate it, then turn off Auto-rotate to lock the screen rotation. No issues, and the rotation is reflected on the home screen and in other apps

The screen then turns off, either because I manually turned it off, or because the screen timeout limit was reached

When I turn the screen back on, the screen has rotated back to the default/0 degree rotation

If I leave Auto-rotate turned on, then the tablet’s current rotation is used - but then the screen can still rotate

Is this an Android limitation, or an /e/OS issue? Thanks