MQM Adapter Queue already open error

We are using the MQM Adapter to retrieve data from our mainframe. We are pairing the Put and Get messages. The transaction works most of the time but now and then we receive the following message

“Debug] 0 KeyServer println (034) Queue BAP.P.CR0G1M00.WME.RETURN.TEST failed to open, error: Object is already open. (2042). Waiting 60000 milliseconds.”

It appears as though the adapter removes the Share option. The integration then retrys 6 times to access the queue.
Our questions are: What is locking the Queue and where is the parameter that specifies the Retry Number?

Thank you for any assistance you may render!