Glanced over the posts regarding mission bugs, though I don’t believe any of them are regarding the same issue that I’ve been noticing.
As the title reads, while in a lobby missions usually won’t show up, requiring you to back out into the menus to confirm what your missions are. This tends not to happen as soon as you “join” a lobby. However after you have played a game, if you choose to stay in the lobby, that is when they will disappear. If you remain in said lobby when the missions reset, they are still invisible.
What you see before playing a game
What you see after playing a game
A minor issue, really. But on a few occasions I have backed out of the lobby to quickly check my missions, and my slot has been taken up before I can rejoin.