Abyss champions loot bug

Hi,
There is a weird bug. The abyss champions drop more loot and better loot if you take them away from the abyss pit and the abyss storm. I have tested it myself and many players expireniced the same.
It gotten to a point where streamers suggest you to do it to make your loot better.
I guess it's not intended as it shouldn't effect the loot drops.
Hopefully it will be fixed soon.