io.fetchSockets() sometimes works across instances, sometimes not

[dizzyjaguar]

I have an app where I need to send a list of all connected clients and rooms to all connected clients.
Sometimes I'm able to get all clients across multiple instances with io.fetchSockets() and other times it will only grab clients from the same instance.

I'm not exactly sure what to try at this point, but I'm almost certain this has to be the issue.

Here is related dependencies:

"@socket.io/redis-adapter": "^8.3.0",
"socket.io": "^4.8.1",
"socket.io-client": "^4.8.1"
"ioredis": "^5.5.0",