There is an absolutely bizarre issue with 1 of 3 haproxy servers, all running on debian 11, all running haproxy 2.7.1, where only one (the one that's in North America) is constantly dropping specifically POST requests with error 408 - a client side error indicating that the client is not connecting fast enough.

This does NOT happen with the EU servers. The error is coming from haproxy, not the nginx backend servers.

I am losing my fucking mind trying to figure out why it's such a piece of shit. They have identical configs.