Redirect which deno deploy instance is used?

My scenario is that I have one websocket connection on east4 and one on east5 and they need to be able to talk to each other. I did set up an in memory cache with broadcast channel but the data was too big for it to handle and it’s too big for deno kv. (It’s chunks of audio) Locally everything works ok as it’s all using the same server so I’m wondering if there is a way when establishing a connection I can override or re-direct which gcp deno deploy instance will be chosen?