VoIP Calls Play Stream not always showing RTP packets…

All traffic is being captured between my VRU system and PBX using dumpcap:

"c:\program files\wireshark\dumpcap" -b filesize:100000 -b files:100 -i 1 -w ivr_dmp_p1.pcapng -f "net <PBX IP Addr>"

The files are being captured just fine and all the data for the calls appears to be in the files, however when the files are analyzed using Telephony->VoIP Calls->Play Stream, the first few calls in the file have, and play the RTP audio, but after the third or fourth call, the RTP audio does not appear in the play stream window. The RTP audio packets can be listened to using Telephony->RTP->RTP Streams. The draw back to this is that it takes a while to manually correlate the RTP audio with the VoIP call.

I am using WireShark 2.0.5, 64 bit. Is this a configuration problem? Should I capture smaller files? any suggestions would be greatly appreciated.

Thank you,

SBrock