TOTP stopped working [SOLVED]

Yesterday TOTP in Bitwarden stopped working. When I log in to Facebook for example the TOTP generated by Bitwarden suddenly is wrong. Same goes with other sites where I have activated 2FA. TOTP generated by Authy works though. Any ideas?

Did you check you system time?


Nope, I did not do that. But that solved the problem. I cant understand what changed the system time. Thanks very much for your help!