I've got 5 hosted. I know 2 of the ASICs have 2 hashboards not functioning, I know one is fine and I'm not sure about the other two.
Tbh it's been pretty hard to get them looked at as the hosting facility is pretty busy at the moment. I've asked for my pool to be switched to MRR so I can test my luck on some other pools when the hash isn't being rented.
I'm happy to try a pool comparison when they switch my pool over to MRR.
Is the latest firmware you mention the one I posted a link to?
how many Zig Z1 Pro you have hosted and do you have full control?
mine is updated with the last firmware and runs very stable with nicehash, but will never reach to 13ghs with all boards (11.5ghs is the average)
see my other post, i've been mining in some pools without problems. unstable hash is normal due to the difficulty in that moment of the coin.
if you agree, we can mine at the same moment and make a pool comparison to see which one pays better. i'm looking for candidates to do this and i will not be controlling your ASIC.