Hello I have 2 activities. When I want to switch from one to another, I use the "Meta + TAB" shortcut. But after the activity switched, the switcher panel doesn't auto-hide. (Sometimes it works fine... I would say maybe 1 time for 6 switches). I'm actually on OpenSuse Tumbleweed, plasma 5.12.5. But it was exactly the same last week on Kde Neon. So it's not a linux distribution problem. The activity switcher behaviour was correct in previous plasma 5.10. Maybe on 5.11 too, but I'm not sure anymore.
*** This bug has been marked as a duplicate of bug 393912 ***
*** This bug has been marked as a duplicate of bug 424020 ***