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SRCDS cannot connect to outside world when bound to purchased FO ip block

I purchased a dedicated server from OVH running Ubuntu 21.04 (GNU/Linux 5.11.0-31-generic x86_64), and an additional block of addresses to accompany it. I used This Official OVH Guide to add these IPs to the network interface. I have done nothing concerning cloud-init that was not listed outside of this guide.

The Problem: When I try to bind an instance of SRCDS to any of the additional addresses, I get the following error:

src/common/tcpconnection.cpp (1036) : Assertion Failed: Tried to initiate an outbound connection to 51.81.183.116:27024, bound to local address 51.81.183.116:26901. An ephemeral local port should be used for outbound TCP conections! How does this work?

SRCDS does not appear to respond or receive incoming requests

I have disabled UFW as a testing measure, but this doesn’t seem to be relevant to the issue.

SRCDS is not behind any form of reverse proxy