Lately, some of my D3s only showing 2 hashboards on the miner status page or 53/54 ASICs (5 out of 20 to be exact). Sent 3 back so far for RMA and received 2 new D3s shipped directly from Bitmain.  I updated to latest firmware but that didn't help. Wondering if this high failure rate is more common with D3s and if there is an easy fix?