Adobe Reader DC cause third party client to crash when trying to view the PDF

Received the following info from our third party support regarding what they see in the event logs when trying to view PDFs from their software through Adobe Reader DC:

Nebulous errors inside the ieframe that we’re using to host the Adobe Reader DC application and this only appears to happen with Adobe Reader DC and not Adobe Reader 11. The ProcMon logs are indicating a number of BUFFER OVERFLOW results which I’m unsure if they are relevant to the issue or not. It appears that the error does not occur inside our code per se, but perhaps there is something going on with how we host Adobe Reader DC and their environment that creates the situation for the error to occur.

Any ideas what nebulous errors are regarding Adobe Reader DC?