Okay, here is a sample set that causes the issue:
https://www.dropbox.com/sh/9al5lwcwmk6qv4t/AADcSrTIRnwSxm7HIY3xvRVFa?dl=0
I also included the settings I used for the token parser as an xml file in that folder.
3 mics works correctly. 2 does not.
For what it's worth, I'd much rather have the .setUseStaticMatrix issue fixed before this...