I had a Weird Album Cover Mismatch today on 5.14, I couldn't reproduce however as when I manually called the track, it worked properly.

Here's an image of the mismatch:

I don't know that there's anything really to look into from your side, but I wanted to post it just in case. Is there a cache I should clear?

thank you for reporting this. the bug only effects the old low quality auto-looked-up images. it has been fixed for v5.15