Based on the 15 minutes bug initiative, I briefly searched visual glitches that are (still?) present on Solus but fixed on KDE Neon.
- In the desktop context menu, entries in the fourth group have 1 pixel off the highlighted area. Other entries are fine instead.
- This is most likely linked to 1. Submenus of the fourth section have no blur, featuring a weird white bar too.
- The first layer of the Dolphin Hamburger menu is grey when blur is enabled. Even here the highlighted area is off by 1 pixel, so linked to 1. and 2.