Yeah, I've also had the same issue with alexis miner. Didn't know it's the miner and at first thought there was something wrong with my rig. 8* gtx 1060 and skylake celeron with 4gb ram. Other miners work fine. Kinda worked around it by starting 4 miner instances with 2 gpu per instance. I don't think that issue affected the total hashrate though, just an inconvenience.