Reauthentication not working in launcher

The launcher told me i had to reauthenticate my accounts. I entered the password and shortly some kind of captcha window appeared and closed itself again before it asked me anything. The account stayed in unauthenticated state.

I tried several times and also restarted the launcher in between. Launcher version is 1.3.3.

The only option was to remove the accounts from the launcher and to add them again. This time a captcha window did not pop up after entering the password, but the 2FA window as expected.

Something is not working correctly. Please fix.