Hi Zex, so if I understand correctly your are facing 2 random issues either the infinite loop or the prompting for you to enter your email confirmation. Can you please do a screen capture so i can have a better idea exactly where this is happening.
Screenshot 1: on a Notebook (on Edge browser) I got always and only what U can see. Also after reinstalling extension.
Screenshot 2: on a desktop PC, Every time I start TK and type main password, I always ask for email confirmation.
Screenshot 3: I open email and click on confirm, and I have access.
Screenshot 4: Then I click the blue button to authorize device.
Unfortunately I always ask for email confirmation and I have to repeat the procedure all times (only with Edge)
I also tried to delete all trusted devices and repeat the process. Same issue, always and only on Edge.
Hope it helps