Since this months patch came out:
Protocol: 2201.186.1
Build Date: 11/07/2019
https://rust.facepunch.com/blog/november-update
The console commands:
mute
unmute
mutelistNo longer work as these are no being used by vanilla functions to "ignore" players (but they can still talk in global). A bandaid fix is using /mute in chat, but console commands have always been ideal (easy mistake fixing when pressing up key etc)