I entered a 1 v 1 match through the new matchmaking system.
Everything was fine until the point where my game crashed once I loaded in. I was able to reconnect.
Started playing like normal.
Went to use courier for the first time but it wouldn't work at all. My short keys wouldn't work, the bottom right wasn't working and even when I selected the courier itself I could not get it to move.

Thanks and I hope this gets fixed, not sure what happened.