Ethminer hash rates reporting multiple GH/s on two GPUs! 100x faster than possible


I have a rig that I rebooted one day. When it came back up, it went from reporting ~60mh/s (where it should be) to reporting about 6,000 mh/s. In reality it’s hashing normally, and the pool hashrate is normal but both the miner output (and subsequently the Hive dashboard) are showing rates that are simply not realistic. It appears as though the hashrate is being multiplied by 100. What on earth is going on?