Cloudflared ssh proxy

Anyone here experiencing random disconnects with cloudflared SSH proxy?
Tunnels are managed from the Cloudflare GUI (remote tunnels).
SSH connections terminate at random times (usually less than an hour or two) so we can’t maintain a constant connection and have to re-login.
It terminates with: client_loop: send disconnect: Unknown error

This doesn’t happen when we setup an SSH session directly to the servers (outside of cloudflared) so it definitely has something to do with the cloudflared proxy.