Just want to chip in as well, I can’t login on android app using my home Wi-fi but as long as I connect to a VPN or use mobile data, I could.
On this reddit thread, lots of people from Malaysia on the Unifi ISP is facing the same issue: https://www.reddit.com/r/Bitwarden/comments/18jf37i/bitwarden_login_issue_on_android/
Note that this only affects the android app, on the same Wi-fi or IP address with PC browser, it works just fine.
I have tried reinstalling the app or older version, it doesn’t help. please look into this A.S.A.P