Position of the main window is lost

[DemoFreak]

Description
When the main window is minimized to the tray, the window is not displayed in its last position the next time the main window is opened.
In my case: I always move all messengers to the right edge of the right monitor, when I minimize Wasistlos to the tray and open it again, it appears on the left monitor.

To Reproduce
Steps to reproduce the behavior:

1. Start Wasistlos
2. Move the window to a specific position
3. Minimize to tray
4. Re-open the main window, it opens elsewhere

Expected behavior
Main window opens at the last position

Environment

• Opensuse Tumbleweed
• RPM package from main repository
• KDE Plasma 6.2.3