Sure as heck sounds like an intentional foul to me, but of course one would've had to have been there to comment for certain.

Seeing how uniforms are a POE this year & our jurisdiction is in effect when we arrive on the court, I like to have all players compliant while warming up.

Have I gone as far as to have them tuck jerseys in the layup line (while wearing warm-ups)?
Ummmmm NO because I'm looking for other things like pivot foot, jewelry, bobby pins, marked coaching boxes, etc.

The uniform issue could have very well been the result of you questioning the officials judgement. Maybe Old School was doing his impression of James Brown & made up a rule to get you with the Big Payback