| HammerJack |
Pathfinder Roleplaying Game Superscriber; Pathfinder Starfinder Adventure Path, Starfinder Roleplaying Game, Starfinder Society Subscriber
For reference, page 304 gives the reason for that.
"Some spells have effects that remain even after the spell’s magic is gone. Any ongoing effect that isn’t part of the spell’s duration entry isn’t considered magical. For instance, a spell that creates a loud sound and has no duration might deafen someone for a time, even permanently. This deafness couldn’t be counteracted because it is not itself magical (though it might be cured by other magic, such as restore senses)."