Infinite login loop when updating user credentials about two-factor-bundle

[scheb]

Well, what I can see so far, it doesn't look like an issue related to 2fa to me, because I see no indication how 2fa would cause this. I think so because:

• The exeception an where it's thrown is not related to 2fa. It happens in the Symfony security core. No Authentication Provider found for token of class "Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken" looks very suspicious to me, because if you're using Symfony's username+password authentication (I'd guess so, but I cannot confirm since you didn't post your security configuration) that authentication provider definitely should be there.
• After completing the 2fa challenge, the authentication state is effectively the same as without 2fa. So there should be no reason for Symfony security to behave differently.

My guess is, if you'd completely remove/deactivate 2fa, you'd run into the exact same issue. Therefore I'd like to ask you:

1. Please deactivate the bundle in your application and try the same thing without 2fa. If you still have the same issue, it's not related to he bundle.
2. Can you please post your security.yaml?
3. Can you please post a stack trace for that exception?

[stale]

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