Player on court during time out

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What would you call or do?

Shooting foul is called near the end of the game on B1.

Coach for team A calls a time out and A1 goes out and practices free throws during the time out.

NFHS:
Rule 1-13-3

ART. 3 . . . The time-out area shall be the area inside an imaginary rectangle

formed by the boundaries of the sideline (including the bench), end line, and an
imaginary line extended from the free-throw lane line nearest the bench area
meeting an imaginary line extended from the coaching-box line.