PSA..
Don't fuck up like i did..
I am working on Legendary Trinket..
Doing all map achievements.
Completed 2 achievement for one story mission, quit. didn't finish the mission.
Move to the next story mission in the same episode(crack in the Ice)
It won't allow me to skip to the final boss battle where the achievements at, tells me not my active story...
Without reading like a dumb ass i quit the Episode then hit restart, restart basically removes the fact you completed the episode, don't make my mistake, now i have to restart the mission from the very beginning instead of completing the first story mission i did for achievements..
PS:On the bright side i got The Legend to drop from a Veteran mob yesterday in Draconis Mons, this is my 5th Pre-drop..
You should be able to go to where the instance would start, you should see a purple icon at the area, touch it to start the instance regardless of where you are in the episode.