A secondary consideration is "when" was either an invalid, or even valid signal, given. The onus is on the receiver to give a signal that allows a charging member of K a "reasonable" opportunity to react properly to it. "Reasonable" is decided (totally) by the covering official.
In the sample play, there should clearly be a flag and a foul. The covering officials decides whether it's Invalid FC Signal or Kick Catching Interference, but it shouldn't be both.