was having this issue on a fresh setup, after a couple hours of changing settings I forced an older version of the docker container, that seems to be working. I'm just resetting all settings and starting from scratch with this version now,
I couldn't ping anything inside the docker container with :latest
change repository in advanced settings to binhex/arch-delugevpn:2.0.3-2-01
edit: recreated and now it won't ping anything again
edit2: switched ovpn config to udp, seems to be ok now