The left column resets its position when I return to the program's window

[Valet2]

Here's a video to show what I mean:

It won't happen if I put a cursor somewhere in the fields of the left column. And yeah, I can right click the cover selection window and choose "add cover", but still...

[ohrenkino]

which MP3tag do you use?
I found this thread on problems with the tag panel scrolling:

Unexpected jumps in long vertical Tag Panel

If I remember right, it started sometime with 2.88x (Win7x64hun.). I have a long, about 2 (earlier 3) times as app's window, vertical Tags Panel configuration(s) on the left side. I want to change something in down, for example the cover. Click in its field -- and the panel pops to the most up. And vica versa, too. Not all time, but frequently -- may be, ~50%. Just now I could evoke the behavior some times. 1 file in the list. Click on it to select. Bring the Tag Panel's scrollbar with the mou…

[Valet2]

Yeah, exactly this problem! The version I was using is 2.79.