If anybody happens to experience this as host, it would really help us out if you could provide us with the corresponding console log. 
Your console logs can be located using the instructions below, and the timestamps should help with identifying the corresponding session.
- Press the Windows key + R
- Enter %appdata% within the search input and select ‘OK’
- Navigate to AppData\Roaming\Fatshark\Vermintide 2\console_logs