I missed it too after 1.3.6. The word "resume" was missing on the upper right side of the Overlay. Since we all click the Gear on the upper right of the game screen to access the Main Menu some of us got lost on how to return to the game. I had never clicked the down-arrow, I always clicked the word "Resume". (not to be confused with resuming a disconnected round).
So here is a screenie for anyone else who didn't know the arrow brings you back into your current round, practice mode, or solo mode.
