You can revert back to a previous version, you just have to set the tag to the version you want. I am running the :dev tag and it seems to be running ok. IPV6 errors have been consistant in my logs for almost as long as I have been running this. I do have unraid set to IPV4 only.
. I have only created the template, not the docker. looks like there was an update within the last couple days
https://hub.docker.com/r/haugene/transmission-openvpn/tags
Its been a while since ive used wireguard, but i dont remember having any issues accessing the GUI using wireguard. how do you have wireguard set? Lan & Spoke i beleive works for me.....
I do have a script that runs though to add lan networks:
docker exec Transmission_VPN /bin/sh -c "/sbin/ip r a 192.168.0.0/24 via 172.17.0.1 dev eth0"
No worries, I have no issue trying to help with configurations, set up etc, but when it comes to the actual container, i cant do much, as its not mine!