Chayula ascension "Sap of Nightmares" chaos leech effect bugged, only for mana

Tooltip says leech, which includes life, mana,
and energy shield (if you got the passive for that).

Actual effect in the ability details is only for mana leech,
even though I have life and mana leech.

I did some more testing with this same notable. Explicit sources of Mana leech from weapon affixes also seem to not work at all with Sap of Nightmares. Support gem sources & Ring sources apparently do, but if the weapon itself has a mana leech affix, Sap of Nightmares won't see it. IDK about Gloves/corrupted amulet rolls.