The Workspace Chooser on the right side of the toolbar, is now broken in Krita Next (5.2.0) nightlies for quite some time. This panel used to have 2 lists. But for some reason, they have become 3x3 grids in recent Krita Next (5.2.0) nightlies, and the text also looked rather glitchy. That's when it "works" -- And when it "doesn't work", the areas where the lists supposed to be becomes two transparent holes. Tested with recent 5.2.0 nightlies, both appimage and android. Krita Plus (5.1.3) are not affected.
Yes, this is known. It's a consequence of https://invent.kde.org/graphics/krita/-/merge_requests/1653 getting merged without sufficient testing... The author of the MR is aware of the issue and is working on fixing it, so we haven't reverted yet.