Help-Player in bounds and out of bounds

[RecRefNC]

Fed Rules
Had a scrimmage (2 whistle) today. Play happened with me as L. A2 runs from wing my side under basket and out of bounds under basket (going around screen), comes back inbounds on trail side to receive pass and shoot from corner.

I didn't call anything (under motto of if I can't explain it, don't call it). No issues from either coach but it didn't look right. Came home tonight, looked at rules, casebook, and "comic book" but couldn't find any reference.

Did I miss the call? Rule cite please.
Thanks,
Chris