This is certainly a unique situation. Ingress would certainly interfere with the service but since the signal levels are in spec, there does not appear to be an ingress issue in your area. I see that this issue has been escalated and is pending at this time but I'd like to ask have you by chance provided us with any trace route data to review. If not, it would be beneficial to send us a trace route to each site you are experiencing the issues on. Be sure to run it while the game is running.
I know how exasperating it is to deal with an ongoing issue such as this. I'm here to help. Due to the uniqueness of this situation, the Forums members are unable to assist you. I know we are working with you on this. Please reach us on Twitter at @CoxHelp, visit us on Facebook, or email us at firstname.lastname@example.org and let us know if you have any further issues after your scheduled service appointment.