Let's say you're changing tracks from one album (A) to another (B). It's possible that when changing from track A -> B, the album art for track Z is shown between A and B while track B is preparing to play.
Little tricky to reproduce but I'll try my best to describe what settings I think cause this issue.
- Cursor follows playback
- Preferences -> Display -> Prefer current selection
Assume you have the following elements displayed:
- Album List
- Album Art Viewer
- Playlist View (with Library Viewer Selection playlist)
Assign a global hotkey to Playback -> Random.
In the Library Viewer Selection playlist, double click on a random track (track A) to start playing it. The album art for that track should appear in the Album Art Viewer since that track is selected.
Single click a different track (track B) in the Library Viewer Selection playlist so that the Album Art Viewer shows its artwork.
Make foobar2000 lose focus, such as by clicking on another window or the taskbar. The artwork for track A should now show.
Press the global hotkey for Playback -> Random.
Before the next random track (track C) starts playing, the artwork for track B shows momentarily before the artwork for track C shows.
This basically causes foobar2000 to have to decode/resize artwork for an additional track that it thinks is selected, making the UI a little less responsive.