Do you have the same issue if you follow the OP’s steps to reproduce it?
Yes. Xbox series X
Provide extra information to complete the original description of the issue:
I fly a lot of coastlines and see this happen a lot, all over the world. It’s probably the most annoying visual bug in the sim for me. (Or maybe 2nd after melted photogrammetry.). Still present on latest SU12 beta.
If relevant, provide additional screenshots/video: