I got a simular issue since Friday evening, but more that I cannot see any player names at all, Tab, F11, F9, y doesn't work any more.
I don't see if I'm online or offline (well, still online, there are other players ), but total no info screen hitting the Tab key.
Still I can play, sometimes ETS2 crashes. I've reinstalled everything, shut down firewall, antivirus etc., but still not working.
The only thing happend, my Windows 8.1 did have an update! I'm still trying if this is the problem, but I'm running out of options, but I'll keep trying.