Crashing Powershell on minimize Mahapps Metro Windows

[Hopfenmann]

Hi, i recently updated from Mahapps dll Version 2.0.0 to newest 2.4.9 and a problem occured. Im using the dll for a small Powershell Script with a GUI. When clicking on minimize in the Metro Window, the whole Powershell crashes without any further error/exception.
Only in the Windows Event Viewer a Information Event with the following infos is generated:
Fault bucket , type 0
Event Name: PowerShell
Response: Not available
Cab Id: 0

Problem signature:
P1: powershell.exe
P2: 10.0.17763.2268
P3: System.TypeLoadException
P4: System.TypeLoadException
P5: unknown
P6: o.Behaviors.WindowsSettingBehavior.SaveWindowState
P7: Pipeli..ution Thread

I started going backwards in the versions and the next working version is 2.4.5.

Is the something i am making wrong or does somebody have similar problems?