autreconnect behaviour

On stepdown of a replicaset master the driver does not seem to retry.

I found a post somewhere that says that when connecting a replset, the autoreconnect flag is set automatically - but was not able to find documentation for this feature that permits understanding the behaviuor.

What is the expected behaviour concerning autoreconnect, and how can we influence it (number of retries..) ?

We use ConnectionString to establish connections, so can't use the constructor of DBClientConnection to pass anything.

Thank you,
Chris