Option to limit retries when client goes offline

I have “Max simultaneous backups = 4”

Sometimes a client will offline before backup starts. They will continue to use a backup slot while throwing “Failed to connect to client. Retrying in 10s”.
I’d like an option to limit how many times the server retries. 2 or 3 times should be sufficient to figure out the client is off and clear the slot.

Thanks for any help. Great product!