I recently had what seems like a false positive for the miner detection. It was a warning that xmrig was running but I couldn't see it in top, and neither my CPU or GPU have been under any load recently. It popped up once and disappeared after a rescan.
I've checked some of the common security problems, and I only have ports opened for torrent clients (I double checked and I can't access ssh, the Unraid webui, or any container's webui from outside my network), I haven't installed any new plugins or docker containers in weeks, and I haven't changed any settings in weeks. The only things that have happened recently are updates to my Jellyfin and NetData containers a few hours ago. I've also never installed anything mining-related on my server.
This is on version 2021.4.11
cooper-diagnostics-20210415-1646.zip