Kaya, The Inexorable has the following loyalty ability:

+1: Put a ghostform counter on up to one target nontoken creature. It gains "When this creature dies or is put into exile, return it to its owner's hand and create a 1/1 white Spirit creature token with flying."

As I have bolded, the ability specifically states creature. If an opponent uses Luxior:

Equipped creature gets +1/+1 for each counter on it. Equipped permanent isn't a planeswalker and is a creature in addition to its other types. (Loyalty abilities can still be activated.) Equip planeswalker 1 Equip 3

to equip to Kaya, she becomes a creature. Kaya then can put a ghostform counter on herself. My question is, if luxior becomes unattached for any reason and Kaya stops being a creature, should the ghostform counter still bring her back to hand and create the token if she is destroyed or exiled? My reading of the cards would suggest that since she is not a creature any longer, the ability should not resolve. Am I incorrect in assuming this? I am looking for an answer that quotes a ruling that either involves these exact cards or a ruling that affects what happens to granted abilities that specifically state they affect one card type, and then that card changes type.

Kaya the Inexorable has the following loyalty ability:

+1: Put a ghostform counter on up to one target nontoken creature. It gains "When this creature dies or is put into exile, return it to its owner's hand and create a 1/1 white Spirit creature token with flying."

As I have bolded, the ability specifically states creature. If an opponent uses Luxior, Giada's Gift:

Equipped creature gets +1/+1 for each counter on it. Equipped permanent isn't a planeswalker and is a creature in addition to its other types. (Loyalty abilities can still be activated.) Equip planeswalker 1 Equip 3

to equip to Kaya, she becomes a creature. Kaya then can put a ghostform counter on herself. My question is, if luxior becomes unattached for any reason and Kaya stops being a creature, should the ghostform counter still bring her back to hand and create the token if she is destroyed or exiled? My reading of the cards would suggest that since she is not a creature any longer, the ability should not resolve. Am I incorrect in assuming this? I am looking for an answer that quotes a ruling that either involves these exact cards or a ruling that affects what happens to granted abilities that specifically state they affect one card type, and then that card changes type.