Void Fissure: Corrupted Buff and Bonus interval not working?

[Vesterbro]

Dear DE, I hope you take a look at Void Fissure mission. There's something has been bugging me;

1. Corrupted Buff for Melee weapon:
Melee Heavy Attacks don't consume the Combo Counter. → Doesn't work at all. Just did a kuva fissure, got a corrupted buff on my melee. Used heavy attack and it still consume my combo counter

2. Bonus per interval:
The fifth interval: a random Exceptional Relic (that can be used in the same mission). (or tenth, fifteenth, and so on) → Does it give any relic at all in kuva fissure? I didn't receive any requiem relics. Does anyone ever get any requiem relic from kuva fissure interval bonus?