Cluster running out of avaialbe connections

I have a single Realm App synced with an Atlas Cluster M0 (free tier), and the connections to the cluster are not being closed.

I’ve tried to remove all IP addresses from the Network Access, and I also disabled the Sync from the Realm App, but the connections are still opened. I don’t have any clients connected to the Realm App at this moment, although I can tell that the number of connections increases (but never decrease) when I start a client.
I do have logs from the Realm App around clients connecting and disconnecting.

I appreciate any help you can provide; this issue is blocking our system development.

Thank you.


Logs from Realm App