Abyss Pits

I don't know if anyone else is having the same issue as me, but recently, I'm finding that a lot of the abyss pits won't unravel more monsters or reveal rewards (even if it's nothing) upon killing all monsters around the area. Like it gets to the point where I clear the whole map and nothing happens. I've got video proof in needed, but it honestly sucks especially so when the map has spawned as 'Amanamu' modifiers.

I've been having the same thing over and over again too, made several threads about it, doesn't look like the devs care much.