Have you tried other drivers , or lowering the intensity ?
There was a bug that made random app crashes, but that was fixed, that's why i asked if a crash window appears.
Been running the Hynix cards as I usually do (1350/2000) and no issues. The Samsung card is running at 1281/1750 and has been running for 2 days 22 hours +. I think it's just on me being too aggressive with OC. Sorry about that.
I'm also noticing that after coming out of devfee it sometimes has a few hashes of [2018-05-11 22:48:07] miner_result: Duplicate share protection kicked in!
Sometimes it's a few, sometimes none, and a couple of times over the ~2 weeks using it I've noticed it ran for a good couple of hours with duplicate shares. I'm not too concerned at this point but wanted to let you know.