Hey kwaw,
Thanks for the explanation, I was doing experiments to see if I could route by port, but the way you explained that it works makes more sense. The routing fix that was applied earlier should be good enough for my use case.
I do have one more question: if I set up multiple machines on the same app in the same region, and give them each a unique port, will it route to the specific machine based on the port, or will it load balance between them regardless of the port?
I did find a reference to UDP port routing here, but I wanted to make sure that was still the case: