[VoiceOps] Level 3 DTMF issues in California?

I was wondering if anyone has been having frequent problems receiving DTMF over Level 3 on calls to areas of California. I've done some troubleshooting and have found the RTP sequence numbers on our affected calls resetting mid-stream along with extremely short duration DTMF signals (along the lines of 15-35ms). I'm not positive, but I think the resets are occurring right as DTMF is being transmitted. Was wondering if anyone else was experiencing something similar. (I do have a trouble ticket open with Level 3 already in case anyone was going to suggest opening one) Brian