Managed to replicate it. At the first attempt with Mullvad, Highlighter picked up my profile. It won't show the pic on the profile editor.

I then logged in with Chrome. Profile info still there. Then went back to Mullvad and profile was missing.

Through the whole process, I tried to save "Freedom Tech" category and it wouldn't.

I also noticed that it wipes out the background pic even though the Highlighter profile composer doesn't have an option to set one.

Please let me know how else I can help. Can also do a screenshare if needed.