Wireless Boxes Freezing

Recently moved and got the new wireless cable boxes. Never had a problem with xfinity services till now. Our main TV has no issues. All the wireless boxes the freeze continually. I have chatted and spoke with tech support numerous times. Refresh signals have been sent, they have checked things on there end and mine and have found no signal issues. I have even contacted the TV manufacturers and have crossed them off. Finally, xfinity sent a senior tech out to fix the issue. The tech repositioned the gateway and recut the wiring. Everything looked good according to the tech. Moments later we back to freezing TV (really annoying when watching sports). Am I the only one with this problem? Seems like the wired pucks are more reliable than the wireless ones.