unbelievable undertakings challenge - Abyss is bugged

The challenge "unbelievable undertakings" requires you to complete 4 challenges where the area level is 81 or higher. It is bugged for Abyss. I now have completed 2 Abyssal Depths in area level 81 (t14 map), and not received the credit. It does however work in area level 83 zones (t16 map). Either you need to fix the bug or change the text to say "area 82 or higher".

bug ref:18270097

Just tried a lv 82 (tier15 map) zone. Didn't work there either.