I contacted support, and this is what they got back to me with.
I appreciate you reporting this to us - it has been lodged a bug internally, and is currently under investigation.
Could you please try tapping the “Not you?” option, then once you return to the login screen, tap the field next to “Logging in as:” and select bitwarden.com or bitwarden.eu accordingly.
Following that, you should be able to log in as expected.
It worked for me, figured I should pass it along