Wire version: 3.0.2816
Wire for web version: 2017.11.10.1041
Operating system: Kubuntu 16.04
Which antivirus software do you have installed: None.

What steps will reproduce the problem:

1. Log in to wire desktop, with a standard internet connection active.
2. Activate a VPN connection.
3. Send messages in a chat in wire desktop.
4. The chat partner will see the messages and replies.
5. The replies will not arrive. They do arrive in a separate device, a mobile phone, say.

What is the expected result?
Either wire recognises a problem and refuses to send or receive messages. Or both sending and receiving should work.

What is the actual result?
Messages cannot be received.

Please provide any additional information below. Attach a screenshot if
possible.
Workaround: Log out from wire and log in again, while VPN is active.