Thunderbird is showing old password in it's gui for gmail

[extent]

As above, yet thunderbird still manages to log in. If I change the password within thunderbird to the correct newer one to test (within tools>preferences) I will receive a gmail pop up asking for the correct password, as gmail believes it is wrong.
I should add that for this gmail account I managed to 'allow thunderbird' security-wise, and given I have more than one other device able to log into this gmail account, all using a newer password, I can only assume the new password is definitely stored in thunderbird, but just doesn't show up in the gui. This is surely a bug of some sort. I am using 91.10.0 32bit on win 10.

[DanRaisch]

What option is selected for Authentication method for that account in that password display panel?

[extent]

For imap.gmail.com 993, it's OAuth2. oauth://accounts.google.com (https://mail.google.com/)

Reinstalling to another location might fix it anyway if the security-auth set up is correct, given it has been updated to that same location for a fair while. I can't rule out something in that folder (or windows itself) being the cause of any issue.

[tanstaafl]

Moved from Thunderbird Bugs to Thunderbird Support as you are not describing workarounds for a bug reported in Bugzilla.

[tanstaafl]

Several people have reported that the password saved from "normal password" authentication causes problems with using OAuth2 authentication. Its recommended you delete the saved Gmail passwords, exit and restart.

[Code Name]

Same here with Gmail account - Sending of password for user xxx@gmail.com did not succeed. Mail server pop.gmail.com responded: Username and password not accepted.

I've deleted and re-entered my Gmail password. I checked all server (incoming & outgoing) settings - ports, authentication method, security, etc. Still No luck!

[tanstaafl]

Are cookies enabled? Thunderbird needs to be able to create a accounts.google.com cookie in order to create a token. Otherwise it fails in various ways.

Also check if anything else is using localhost (127.0.0.1) such as a local web server, XMPP or AVG Mail Shield.