I am constantly changing nicknames to good names on the server. The Rename plugin.
nicknames to be displayed from the steam... It is sad.

this concerns the channel. Connect/disconnect.
this is not always the case. sometimes nicknames are from the server, sometimes from the steam.

I checked. nicknames from steam are displayed when the player is connected. and when disabled, nicknames are displayed from the server.

...upd
I'm confused, sometimes the opposite....