The version of mullvad that came out before the most recent is causing the mullvad-daemon to randomly use 400% cpu and block the internet. It happens when connecting to mullvad for any reason, and rarely just happens out of nowhere. When trying to install the most recent version it says “You cannot install Mullvad VPN in this location. The Mullvad VPN installer does not allow it’s software to be installed here.” I’ve been using Mullvad for years and never had an issue installing. The only fix I found was to allow the installer some permissions but I can’t select the installer to allow them.
Hate to ask, but, why are you saying 400%? that makes me question this, not saying you’re lying but, if its hyperbole, shoulda clarified, anyways, I cannot help, but sometimes filling the post with comments, even your own can get it noticed, so, maybe try being more specific about what you’re trying to do if uninstalling then a clean fresh install can’t fix it.