I'm using fedora30 with zawertun copr repo for plasma 5.17.0 running on intel graphics (HD 630, Mesa 19.1.7) My task switcher (alt-tab) is set to 'breeze' and the compositor is providing 'accurate' previews of the windows to be switched along. When logging off and logging in again, the previews are replaced by icons (big ones) Just going to compositor and switching from 'accurate' to 'crisp', apply, and back to accurate solves the problem, the previews are here again.
Works for me with "Accurate" in Plasma 5.21. Can you test again to see if it's still happening? Thanks!
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!