It appears that when #L2 reaches between #K3 and #K22 to "deflect" the pass the official calls a foul on #L2 and must believe that foul was against #K22. With the position of both #K3 and #L2 with their backs facing the calling official he doesn't have the best look at the "foul".
I don't recall any other angles for replay on the play so I'm not sure who the foul was actually on.
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