I thought I had this fixed months ago when I updated the Comcast URC code to 202.
(Sample) Favorite Channel Macro:
9
.2 sec delay
0
.2 sec delay
6
.2 sec delay
enter
Symptom:
It might instead appear as 90006 on the DVR. Database code set: 202 ( I had similar symptoms when I first installed the MX-990 about 10 months ago...using code 195.)

I kept this on the IR blaster from months ago as part of a troubleshooting step.
I didn't have any emitters with me today when I visited, but I don't think the IR blaster would cause this intermittent symptom. (It's never that easy.) I can disable the blaster and install an emitter on the cable box, but that almost seems like a waste of time.

No RF interference detected.

MRF-350 is about 6"- 8" from the cable box. The antenna is about 10"-12" from the cable box.

The problem only seems to occur once in about 20 attempts on the Favorite channels.

Any ideas?

Thanks in advance!