In reply to a post by BuckleZ:

It doesn't affect all, I have a HH5 on Infinity2 at my parents and I have seen connection times of 20days+

I suspected as much. As far as I know, this is BT's final word on the matter: https://community.bt.com/t5/BT-Infinity-Speed-Connec...

It's plainly not the reason for the OpenRG reboots, so by stating this as the reason and not commenting further, I can only assume they don't know the real reason, or they don't want to tell us.