I did, I mined at https://lethean.herominers.com/ and they clear all my coins. It still find blocks normally. I think others pools have problems but Herominers has not.
Well, herominers "found" ALL the blocks from 296805 till 297079. With the total hashrate of a single mining rig - the whole pool is just a few KH. 
I understand that for someone mining there it's like winning a lottery, but that just sounds like a chain split or some sort of bug. Have any of those "mined" coins actually arrived to your wallet? No, all coins which I mined was cleared.
