If i'm not wrong this happen on Saturday or Sunday, when STR market falling to 1400 satoshi, and I was panic too so I'm withdrawal my Bitcoin to another exchange need longer than usually to get process from Poloniex but finally got my Bitcoin. In my opnion Poloniex still the good exchange for altcoin market, I hope all this isuess will get fix soon.
I hope it too, not for poloniex but the users. not all eggs in one basket the saying goes...