Hello Glen:

We are currently in the middle of preparing our next maintenance releases 4.3.6 and 4.1-ESV-R15 for beta release, currently scheduled for 7/14 with  final release on 7/31. 

As time permits we will investigate your issue and update you with our findings.  We're a small non-profit with finite resources and work on what we can as we can.  We do offer support contracts if your needs are more pressing: https://www.isc.org/support/ 

We appreciate your interest and thank you for reporting the issue to us and for your continued patience until we can address it.

Regards,

Thomas Markwalder
ISC Software Engineering