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Could be! I think mine is a V2. My guess is an overheating component somewhere.

The 5Ghz is actually handled by a daughterboard using a mini PCIe slot (not sure about what the actual interface is tbh).

And yes, it overheats, especially in sustained transfer.

Slap a heatsink on all the chips and call it a day :D

Stock firmware and the 5Ghz band dies on me every few months requiring a reboot. interesting.