Could be a firmware issue or maybe a bad control board; I don't get why out of the blue it is performing factory resets... Can you confirm that everything goes back to the defaults that were there when you first booted the miner?
Last but definitely NOT least, stop mining on Antpool and move over to Kano.is, Slushpool,
I completely agree. It's bad enough that you bought Bitmain's ASIC crap and now you're still mining with them at Antpool (which is less profitable!). Kano.is or any other pool is highly recommended over that.
While I think the recommendations are excellent; this advice only relates to mining BTC; except I think Slush also mines ZEC I can't remember haven't been there in a while.
But OP may want to shop around for a different pool, make sure you explore all avenues to maximize your earned coins.