Its still weired that the login failed multiple times and bitwarden[.]net doesn't redirect to the homepage, as the other official domains do, and so on.
Nonetheless, all seems to be fine, gladly.
Thanks for your input.
I've tried to log into Bitwarden and used vault.bitwarden[.]net, it failed. Also, this page is the only one on this domain (nothing on bitwarden[.]net) and the SSL Certificate differs.
Might be a testing/beta website, note the version number displayed at the bottom:
.net is at Version 2023.5.1
.com is at Version 2023.5.0
Also, the login form definitely does behave like the original site (given that Bitwarden is open-source, that is extremely easy to accomplish, however).