Two skin (exoskeleton? 🤔 bees don't have skin) mishaps
I'm pretty sure the .ItemSeparator element is extending too far?
<element id="Content[AlbumAndTracks].ItemSeparatorLine" fg="highlighted" />
This is the scroll bar for the Tag Explorer. It was fine until I modified the bg
*This persisted through restarts, but the panel just refreshed and now the ScrollBarThumb sits properly above the SectionHeader. I dunno if you want to put any effort towards this since it works now, but it may be replicable.
EDIT: The below bug just returned, so it is a persistent one
<element id="Panel.SectionHeader.Default" bg="darkGreen" bg2="gradientBG" fg="mainText" />