I have lots of bluray ISO files that I'm slowly converting to mkv so I can play them on more devices than just my Dune player but when I open one of the ISOs in MakeMKV from my Windows PC the conversion starts and then fails after a few minutes during which time the Unraid web gui crashes and my docker containers lock up. This also happens if I try to copy one of ISOs to my Windows machines first.
Unraid becomes responsive again after a couple of minutes. The only way round this that I have found is to manually set my NIC in my Windows machine to 100mbps duplex which obviously takes longer but does work. My network seems fine, all hardwired and I can transfer a large file between two Windows PCs fine