In creating a minor villain who uses feather fall to escape, I considered the possibility that a PC might try to tackle(grapple) them as they descended. It wasn't clear that this situation is addressed by the descriptions of grappling, or Feather Fall, and I didn't find a reference here, or in errata/sage advice entries. I figured three possible interpretations based on the available rules.
Overly RAW reading of Grapple rules(half serious): Grappled targets are reduced to zero speed, thus the feather fall speed of 60'/round would become zero, and they would both hover in the air as long as the grapple was held.
The grappler does not alter the spell effect, and may float down along with the caster (the negative extrapolation from this option being that a caster can allow anyone hanging on to them to also float down)
The grapple attack or extra weight disrupts the spell, and both fall the remaining distance.
Is there a reference regarding grapple or feather fall that I have missed that would indicate the correct resolution?