This kind of feels like a no brainer. I just recently missed a queue because I was in crafting mode and I wasn't able to switch over to the job I queued as due to another issue I find (see below for expanded details).
I don't know why this is hasn't been put in game or any reasons why this wouldn't be, but hitting "confirm" on a queue pop should auto-switch you to the class you chose. Tired of having to hunt through my set list or action bars just to be able to switch class.
Long section:
So, I set my crafting to auto-synth and went afk for a few minutes to eat some food. Come back and queue has 10 seconds left before I get kicked for not responding.
Stuck in the synthesis menu because hitting 'Esc' does nothing and I did not realize that.
I missed queue because you are forced to click "end synthesis" and wait for your character to leave the crafting animation before you can switch jobs.