Bug 456469

SUMMARY
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Floating panel isn't maximized when using multi monitor.
NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE
1. setup dual monitor setup
2. use floating panel on the left side of first monitor
3. set the 2nd monitor so that top border of both monitor didn't lineup.
4. maximize window in the primary monitor.

OBSERVED RESULT
Floating panel didn't maximized

EXPECTED RESULT
Floating panel maximized

SOFTWARE/OS VERSIONS
Windows: - 
macOS: -
Linux/KDE Plasma: Fedora 36/ 5.25.2
(available in About System)
KDE Plasma Version: 5.25.2
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.3

ADDITIONAL INFORMATION
I have 2 monitor setup, 1980x1020 (primary) and 900x1440 (secondary) monitor. The 1st monitor connected by DP and the 2nd one connected by HDMI. I set my monitor, so the top  border of both monitor isn't lineup. When I maximize windows in my primary monitor, the floating panel isn't maximized. However, sometime if I disable my 2nd monitor, then enabled it again, the panel is maximized if I maximize windows in my primary monitor. But it's not consistent and will not work again after reboot.
Meanwhile, if I set my monitor so the top border lineup, the floating panel work perfectly. It will maximized when I maximize windows in my primary monitor, and not maximized when I maximize windows in my 2nd monitor.