Bug 448693

SUMMARY
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I tried to change many components in Appearance setting tab. Everything else are okay except cursors tab. I can download cursors pack but cannot Use it. Even default Breeze cursor pack didn't work well
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STEPS TO REPRODUCE
-Uninstall every custom cursors pack 1st
-Install new pack from Get new cursors...
-Downloaded package, when I click on Use button get error 
   "Failed to adopt 'Oreo Cursors <package name>'
QSocketNotifier: Can only be used with threads started with QThread"
-Close Download tab and restart System Settings. All my downloaded cursor pack disappeared when I didnt uninstall
-Cursor pack will back to default Breeze 
- I opened these app after apply all change in appearance setting: Chromium 97, Firefox, Steam, Baobab, Gparted, Clementine. Except Firefox, all other app get no respond on mouse cursor image . I can click , right click, middle click abnormal, but cursor display no any change. I waited 5 minute when my cursor put at a hyperlink but it didnt change to hand icon. If I alt tab between opening app, the cursor will change but it stay in difference windows app. In this case, I alt tab many time and keep mouse stay at hyperlink position, it will change to hand icon. But if I continue alt tab to Clementine and move cursor, it still appear as a hand icon

OBSERVED RESULT
It appeared everytime

EXPECTED RESULT
Cursor icon work well again

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 22.04
(available in About System)
KDE Plasma Version: 5.24
KDE Frameworks Version: 5.90
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Tested both X11 and Wayland session get the same result