What’s odd is that I dont have these issues. Have you logged out and
logged back in to Mullvad to create a new device?
Cloning sys-mullvad seems to work for me, and I dont have reports from
other users of the issues you see.
It could be selection of endpoint, protocol, or effects of MTU.
If you create a new device on the clone and attach to the same
endpoint, do you have issues then?