Tough sideline call

[MelbRef]

This seems to be a tough call for me. Open to advice on what best to focus on.

When a player is dribbling fast up the sideline in a fast break situation, and the defender is sprinting along side pinching off the dribbler until he/she dribbles out of bounds. Maybe slight contact during the pressure. Maybe he/she is being ridden out of bounds. Maybe he/she should have passed or reversed dribble instead of trying to run the sideline.

This happens frequently with Middle School to JV girls.

It's kind of a subtle thing, but you can anticipate it as it's happening.

One associate said that when it's a close call that they like to call "out of bounds", with the ball back to the offense (dribbler), instead of a foul on the defender.

You guys have all seen it.
Thoughts?