In sandbox mode pinging works, in matchmaking it doesn't.

[artifactlover0]

Using mousewheel 3 I can ping in sandbox mode. However in matchmaking all it does is bring up the chat wheel, no matter how briefly i press mousewheel 3. Also Y in sandbox mode only brings up chatwheel and acts the same in matchmaking. Mouse wheel 3 is able to be chatwheel if I hold it down in sandbox.

 

[artifactlover0]

Pinging now works for me in multiplayer matches, thank you!