Reverse Proxy Sites Blank on Certain Browsers (Safari, Zen Browser) but Work Fine on Brave

Hey everyone,

I'm running an Ubuntu Linux server and use Docker for most apps (Portainer, Nextcloud, Pterodactyl, AdGuard, Immich, Audiobookshelf). My reverse proxy setup is Nginx, and I use a Cloudflare domain.

Everything works fine in Brave browser, but when I try accessing my reverse-proxied sites on browsers like Safari or Zen Browser, the pages load as blank. No error messages or timeouts, just a blank screen.

I've ensured DNS and Cloudflare settings seem correct and SSL/TLS settings are active and valid. I'm wondering if anyone has experienced a similar issue and might know where to start troubleshooting?

Thanks for any tips or ideas!

Update: Resolved it, I cleared nginx cache and everything fell into place. Thanks to the people that replied