SUMMARY kde gui is freezed by archive mail agent about 10 s and consumes 100 % of one of the four cores STEPS TO REPRODUCE 1. update at the same time to kde apps 19.12.2, plasma 5.18.0, framework 5.67.0, qt 5.14.1 2. Wait for archive mail agent job starting 3. OBSERVED RESULT you observe a freeze of the kde gui of about 10 s EXPECTED RESULT you observe a freeze of the kde gui of about 10 s SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.18.0 KDE Frameworks Version: 5.67.0 Qt Version: qt 5.14.1 ADDITIONAL INFORMATION kde apps 19.12.2 2 558 mails size 850,4 Mio
I'd say that after updating such core libraries you need to at least log out / log in...