[6.12.4] WireGuard different behavior depending on whether array is on or off

Hello,

I have activated WireGuard via the VPN Manager. I use the default settings:
 

Unraid IP: 192.168.1.199

Tunnel

• Local tunnel network pool: 10.253.0.0
• Local tunnel address: 10.253.0.1
• Local server uses NAT: Yes

Peer 1

• Remote access to LAN
• 10.253.0.2

Now I connected via Smartphone (Android) and WireGuard App.

Scenario A: Array is stopped (off) => This is fine

• I can access Unraid but not the Shares (Array is down!)
• I can access other PCs in LAN like 192.168.1.117

Scenario B: Array is started (on) => Here is a problem!

• I can access Unraid and all Shares
• I can access Docker Services like NextCloud
• I can not access other PCs in LAN like 192.168.1.117

Why is there a different behavior? What can I do to fix the problem?

Scenario B should also be able to access the devices (e.g. 192.168.1.117) in the LAN.

I hope someone can help me with my problem. Thank you very much.