GL-SFT1200 Wireguard problem

I have several GL-SFT1200 to get give acces to our Network , 1 is not able to connect to the wireguard server via 1 network if i use a other internet source it works fine.
When the router is in that problematic network the clients that are connected to the opal router can create a wireguard connection without problems to our server so firewall shouldn’t be the problem.
I also upgraded the firmware and it didn’t change anything.

Is there a way to see the wireguard client log messages , because the only think i see currently is the vpn staying orange ?

Thank You

Are you using snapshot version firmware?
Here you can copy log: