@olyandros Welcome to the forum!
Did you login with another form of 2FA on the mobile app before and checked “remember me”? That’s usually the reason, you don’t get asked for 2FA for a while (see here: Why is Bitwarden not asking for my enabled two-step login method? | Bitwarden Help).
As explained in the link, you can “Deauthorize Sessions” in the web vault (Settings → My account → “Danger Zone”), as that also “resets” the “2FA remember me”. But be sure to have all login credentials for your Bitwarden account at hand, as you get logged out on every BW app if you deauthorize sessions.
Hm, there was at least another report of that: An error has occured. Invalid device data I don’t see it as an issue on GitHub, so it probably should be reported as a bug (“New issue”).