no { with German Keyboard via RDP (Remote Desktop APPx App only)

Version: 0.7.3451.0 local machine: Microsoft Windows [Version 10.0.18363.535] RDP (PAW): Microsoft Windows [Version 10.0.18363.535] WinPS 5.1 and PSCore 7 rc1

I am using the Remote Desktop and Remote Desktop Preview APPx apps to connect to my virtual PAW where I run Windows Terminal Preview (version above and previous). Only in this configuration with a german keyboard, i get "^_" when I want to enter "{". "}" works, it works with an english keyboard, it works with classic RDP client and of course on local machine.

I wonder if this should be an issue for the Remote Desktop App, but since the issue ONLY happens together with Windows Terminal Preview, I'd rather have it here.