SUMMARY
When using two 1920x1080 monitors (right monitor being Primary/Screen 1) with 90% width, when Yakuake is set to Screen 1 it spreads over onto the second screen (it's aligned too far left). It works properly as expected however if Yakuake is set to use Screen 2/secondary monitor.

STEPS TO REPRODUCE
1. Plug in two 1920x1080 monitors
2. Set the right monitor to Primary via KDE Display settings
3. Set Yakuake to use Screen 1 and 90% width

OBSERVED RESULT
It spreads over onto the second screen (it's aligned too far left).

EXPECTED RESULT
It should be properly aligned as it is when using Screen 2 as a setting.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Kubuntu 21.04
(available in About System)
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION