Random http requests fail

Hi there,

my vaultwarden server is running since over 2 years with no issues. No I start to see very strange behaviour. I can’t login anymore and after pulling the latest image and executing docker-compose down and up -d I continue to see some requests go fine and other fail.

Now you might say it’s the nginx reverse proxy. But other services running behind the same reverse proxy work seamlessly. I don’t see any logs mesage that could be interesting to share.
it is as emtpy as this:

bitwarden_1 | /--------------------------------------------------------------------
bitwarden_1 | | Starting Vaultwarden |
bitwarden_1 | | Version 1.33.1 |
bitwarden_1 | |--------------------------------------------------------------------|
bitwarden_1 | | This is an unofficial Bitwarden implementation, DO NOT use the |
bitwarden_1 | | official channels to report bugs/features, regardless of client. |
bitwarden_1 | | Send usage/configuration questions or feature requests to: |
bitwarden_1 | | EDITED TO BE ALLOWED TO POST IT or |
bitwarden_1 | | EDITED TO BE ALLOWED TO POST IT |
bitwarden_1 | | Report suspected bugs/issues in the software itself at: |
bitwarden_1 | | EDITED TO BE ALLOWED TO POST IT |
bitwarden_1 | --------------------------------------------------------------------/
bitwarden_1 |
bitwarden_1 | [INFO] Using saved config from data/config.json for configuration.
bitwarden_1 |
bitwarden_1 | [WARNING] The following environment variables are being overridden by the config.json file.
bitwarden_1 | [WARNING] Please use the admin panel to make changes to them:
bitwarden_1 | [WARNING] DOMAIN, USER_ATTACHMENT_LIMIT, SIGNUPS_ALLOWED, ADMIN_TOKEN, SMTP_HOST, SMTP_PORT, SMTP_FROM, SMTP_USERNAME, SMTP_PASSWORD
bitwarden_1 |
bitwarden_1 | [DEPRECATED]: SMTP_SSL or SMTP_EXPLICIT_TLS is set. Please use SMTP_SECURITY instead.
bitwarden_1 | [NOTICE] You are using a plain text ADMIN_TOKEN which is insecure.
bitwarden_1 | Please generate a secure Argon2 PHC string by using vaultwarden hash or argon2.
bitwarden_1 | See: Enabling admin page · dani-garcia/vaultwarden Wiki · GitHub
bitwarden_1 |
bitwarden_1 | [2025-02-05 21:12:17.154][start][INFO] Rocket has launched from http://0.0.0.0:80

Only if I use the bw CLI I can try to login (with the correct credentials but it tells me they are wrong)
In the logs it looks like this:

[techtimo@no-cloud vaultwarden]$ bw login user pass
bitwarden_1 | [2025-02-05 21:14:45.339][request][INFO] POST /identity/accounts/prelogin
bitwarden_1 | [2025-02-05 21:14:45.339][response][INFO] (prelogin) POST /identity/accounts/prelogin => 200 OK
Username or password is incorrect. Try again

I have searched the forum but could see something similiar yet. I’m happy for any suggestion. Thank you,
Timo