6.4.5.1 A jamming infraction is called when a player causes an opponent to dab, or crash, by placing their mallet underneath their opponent’s front or rear wheel.
This reads to me very clearly as mallet under wheel is only an infraction when the opponent actually crashes or dabs.
However, I see refs whistling on this as soon as there is a mallet under someone’s wheel and in my experience this also seems to be the call that players expect.
What’s going on here? Am I missing something? Do we need an update on this rule? Should refs learn to whistle by this rule?