Access-Word 2016 mail merge exclusive lock issue

I have a 2016 MS Access - Word application.  The database has the front-end code stored in an Access db on each user's c-drive, and that front-end db links to the actual data which is stored on a fileserver.  This application supports MS Word 2016 mail merges.  These mail merges all have one datasource which is driven by a single temp table that is created on the user's local db copy.  If that single user wants to open more than one merge letter, they receive a run-time 3009 stating that 'you tried to lock table 'blah blah' while opening it, but the table cannot be locked because it is currently in use.  Wait a moment, and then try the operation again."

From what I can tell, the first merge letter is using an exclusive lock on the MS access temp table datasource.  Is it possible that the merge letter cannot use an exclusive lock allowing the single user to open multiple merge letters that are all based on the same temp table?

Thank you in advance!  -Jason