I don't have an answer, but I do have a similar problem and perhaps if I add some details on recreating the bug someone with more knowledge than us can offer a solution. I'm also curious if my steps for recreating the bug work for you. If not I'll start a different thread as it would potentially be a different problem. Also, did you notice this before updating to the latest edition of Spotify?
I'm on an M1 MacBook Pro (Monterey 12.4) and the issue started after the most recent Spotify update. I have also tried restarting my computer + clean installation of Spotify.
Steps that I used to recreate:
PART A: Trigger
1 - Select song and skip to middle (or anywhere that isn't the start or end)
2 - skip 1 song (or a few) forward or back (I've found this step to be occasionally unnecessary but have been able to trigger the bug more consistently with it)
3 - If 2 results in the progress bar getting stuck skip to Part B. If 2 results in normal behavior, repeat Part A.
PART B: Test.
- Does clicking anywhere on the progress bar temporarily resolve the issue? If not try clicking on several different parts of the progress bar while the song is playing a noticing if the bar moves. (For me, this works and has been my primary method of resetting the problem to recreate it and test)
- Does restarting Spotify temporarily resolve the issue? (This also works for me)
- (If you're on a laptop) After resetting the issue, does repeating part 1 with the trackpad cause any similar issues? I get that sounds strange, but I'm unable to make the bug happen when I use a trackpad. I can reset the progress bar to being normal by restarting Spotify or clicking the progress bar and then repeat Part A as many times as I want and I'm never able to trigger the bug. When using a mouse it seems to happen every couple of attempts.
Hope this somehow helpful.