In the act of shooting?

[Judtech]

Had this VERY recently.
Double whistle I had foul, partner had travel, ball went. I didn't see the travel, but knew the defender had bumped the ball handler. Partner didn't see bump but saw the travel. Unfortunately for the player they made a heck of a shot. We put them on the line for two, and yes I had fun explaining to the coach. The fans in attendance also thought we were mistaken in our rule interpretation.
"How can it be two shots if the shot went in?"
"Your player was in their habitual (love that word) shooting motion when fouled by the defender. The foul caused your players pivot foot to return to the floor prior to the shot, thus negating the basketb because they 'violated'"
"That was a lot of big words, so I guess you know what you are talking about, but I still don't understand it!"