@buesra24 When I said step-by-step I meant:
Step 1
Step 2
Etc
Not that you should write an essay 😉
But OK after parsing that slightly confusing chunk of text I am able to reproduce it also with tabs on top.
Video: https://0x0.st/XKYB.mp4
I will update the bug report that it also happens with tabs on top.
No idea when it might be fixed, it's not a high priority. You really have to try hard to reproduce this and most users wouldn't encounter this often unless they did a lot of full-page text selection.
For reference in case it appears in a changelog, this is:
VB-104719 Tab thumbnail appears as you select the text
Reported on 8 march.