@jrhjr No problem here, also I don't unplug my WAN cable...
Anyway, one other thing you can try is not failing back to WAN but to another VPN-Client. As far as I have understand you, it is not WAN failing but a VPN-Client. We, in this thread, do use Gateway Groups for VPN-Clients and it is working for us.
And btw. not every redmine ticket/issue is affecting everyone.