I just talked with Comcast rep and was told that the software engineers are aware of this. But, he could not tell me when it might be fixed, or even if they are working on it. He did say that if it got resolved, likely the only way we will know about it is by "keep checking". My guess is that they are not fixing it because the only way around this is to keep one DVR cable box and rent their wireless box for $10/month! No financial incentive there.
If anyone has any other information, please share.