I have 20 S5 running since one week.
ALL of them freqently (within 12-24 hours) get "lost.
I cannot acces them through webinterface and not trhough putty.
They are mining (all lights show normal operation and they are hot), but NOT at my pools. No hashrate there.
I have restart them by pulling power, then they work again normal for a few hours.
Running different firmwares, happens with all of them. None of the other miners (S2s, S3s) is doing this.
Makes me think if i bought 20 pieces of crap or if somebody guilt in a backdoor to have them mining for somebody else frequently.

I cant watch the miners 24 hours a day and then drive over to trhe place to pull power twice a day.

No answer from bitmain.

Anybody with similar problems or a solution?