Maybe they didn't see it, OR----maybe the felt he was forced out, but not a ton of contact to warrant a foul, but enough to cause player to step OOB---SO instead of banging a "cheap foul"---official decides to ignore both, and play on...
I have done this before....Even on a push, AKA, "over the back". I give the ball to white, and coach yells, "Borden, they clearly hit it man....."---And I'll walk over and say, "Ya know John, probabaly so. BUt your guy banged him good, but I didn't wanna put a cheap foul on your dude, so I decided to give them ball. "Well, ****, Borden, just call thre god damn foul then". Ok, John, I will----So next time instead of them JUST getting the ball, and us moving on-----they're gonna get the ball, AND your guy is gonna get a foul....So which scenrio do you like better, John----THem JUST getting the ball----Or them getting the ball AND your guy ALSO getting a foul?
Usually the conversations ends there.
Same with stepping OOB----If I feel the defender wasn't legal, but ya know, kinda of meh---and his action causes player to step on the baseline/sideline, I'll leave both alone, play on. Which leads to the same conversation at times...
"Borden, he stepped OOB."---
"Yeah Mike, looked like he did---but your guy bumped him a tad. I didn't wanna call a cheap one there, so I just let it go...."
Well, call the god damn foul, if he fouled him....
OK, Mike, I will. So next time, not only do they get to keep the ball, but your dude's getting a foul as well.. Which scenario you like better, Mike?
Again, conversation usually ends..