Hi,
Thanks for the repro! This was a tricky issue due to trying to re-connect in the middle of a processing a command which resulted in a dirty write buffer. The fix was to send all required commands upon re-connection (like setting AUTH password on the connection) directly to the socket (i.e outside of the write buffer) which was added in this commit.
This change is available from v4.0.55 that’s now available on MyGet.