I have the same set up but different issues. The wifi on the HH3 keeps losing devices and the only way to get them back is to reset them all. Its happening daily and its really peeing me off. I’ve been through the HH3 and tried the wifi on quiet channels but it makes little difference. The HH2 I had before was more stable but it won’t run with the Infinity box. Most of my devices are hardwired in and they work fine its just the wifi which is poor. Looking through the BT forums shows I’m not alone and no other fixes seem to be available other than changing the wifi router.
Speaking to a geeky friend of mine about it he suggested the Dark Knight
Much greater functionality than I require at the moment but he is very impressed with his and has set up his kids on a different wifi network with restricted access etc etc. I’ll probably do the same as my kids are starting to look at the internet and what they look at is only going to get more worrying as they get older.
Edit. Not the cheapest solution but the additional functionality might prove worth while.