I installed my new superhub 3 last night as per the instructions and internet activity all seems fine. The issue I am seeing is that the base light is a solid red (as in red like the VM logo) when I run in modem mode, yet internet is still fine.
From the VM troubleshooting, it usually means the device is overheating, but that area of the room is ~21c (yes, I checked). It has a clear space either side of the hub and at least 10 inches behind so it is well ventilated. If I disable Modem Mode Only, I do get the off-white/pinky/magenta base light. I then enable Modem Mode and get the solid red light again.
I have also tried a couple of restarts and also a reset using the pin hole but same results each time. Like I said, the internet runs fine so I'm hoping it is just a software bug but I'm a little cautious that the light might indicate a problem that could cause damage to the modem.
I would call VM but with the current situation, there are probably bigger fish to fry than an led showing as red.