Hi,
I'm on latest GOS build, sometimes gesture navigation dock (that thick white line at the bottom not sure what it is called) appears on left side of the screen instead of at the bottom. Screen rotation is turned off and using stock GOS launcher.
Also this is not app specific have seen this happen in mastodon, firefox and some other apps.
Have not seen any issue in gesture functionality, it is more of a UI thing.
Note - Not sure how to upload screenshot from phone, if screenshot is required do let me know will upload it from PC.