This happens quite often: Now playing tab -> right main panel (with lyrics activated).
For example, something like this appears after fetching lyrics:
<!DOCTYPE html>Atheist - Animal lyrics | Musixmatch[schema.org,
@type: MusicRecording,
@type: MusicGroup,
name: Atheist,
description: Lyrics for Animal by Atheist. ,
headline: Atheist - Animal lyrics | Musixmatch,Animal,
name: Animal,8387688_500_500.jpg'gtm.start':d.getElementsByTagName(s)[0],3 localStorage.getItem('theme') ||
3
And then the proper lyrics follow.
Editing lyrics, does remove this, however if you ctr+tab to a different tab and then return it reappears. Meaning it somehow doesn't get saved.
https://imgur.com/a/7dJZACA