SUMMARY
***
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See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
when you open a application in a maximization way, then drag it to exit the  maximization mode, the cursor position will always be in a wrong position (always in left corner actually) 

STEPS TO REPRODUCE
1. open a application
2. maximize this application
3. close the application
4. reopen the application
5. drag the application to exit the maximization mode

OBSERVED RESULT
cursor has a wrong position (not in the drag position, but move to left corner)

EXPECTED RESULT
cursor has a correct position (stay at the drag position on the window header)

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: fedora 26 kde spin
(available in About System)
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.98.0
Qt Version: 5.15.5

ADDITIONAL INFORMATION