App-V 5 package for Reader DC - RdrCEF stopped working, InPageError

We have followed the white paper solution (App-V Deployment: Reader DC — Enterprise Administration Guide ) for creating a virtual app-v 5 package for Acrobat Reader DC (15.020.20042), and when we use the software after it's deployed (via software center part of SCCM 2016) we occasionally get the above error on either the RdrCEF.exe or AcroRd32.exe. We are unable to deploy this to our users in this unstable state. Any assistance would be most welcome. Has anyone else encountered this behavior?
