having the same problem here. mainly play single player and make password portal experiences and play bots cause ive never liked online play of any game. since last update on 2.18 hosted matches stay up when i leave to go make changes on the portal experience site. when i save and go back to the game it still shows the first match as active despite NOBODY being in it. "take down" does nothing. every once in a while (not at all today) if i hit "join match" it closes the match and lets me view all my experiences and start a new match.
also since last update you cant edit loadout with class before matches. on controller you have to hit start then edit loadout to change any weapons. doesnt make any sense to change the way that it was before.