There has been a few times when I would play a Yubel support card, like Nightmare Throne or Nightmare Pain, it would get negated, like with Ash Blossom or Infinite, only for it to glitch and have only part of the effect start working. Like with Nightmare Pain, it got negated with Infinite, but suddenly it loses its effect to inflict battle damage. So unless this is a ruling I don't know about, this seems to be a glitch.
#Error with Negation
deep zinc
dapper vale
Its not a glitch involving the cards bring negated. The lastest update caused mismatched set codes for Yubel support and Voiceless Voice. As a result, Yubel cards dont recognise "Yubel monsters", so Nightmare Pain doesnt see any "Yubel Monsters" on the field to apply that effect. Samsara D Lotus also cant tribute itself to summon a "Yubrl monster" and Eternal Favorite cant summon one from the GY.
Were working on a fix and Im hoping itll be ready either later today or possibly tomorrow