Why shouldn't he? Every time he's done it so far, he's been given nothing more than either a finger-wag or a nominal fine that wouldn't even qualify as pocket change. If you were engaging in behavior you wanted to engage in and the judge told you to stop or he'd fine you $1.79, would you care?
So far every single one of these judges have bent the knee to Trump. They have all admitted to giving him treatment that nobody else would receive. And they have all proven that their threats are empty. Why should he follow the rules when he knows he'll suffer no meaningful penalty for breaking them?
Throw this guy in jail for a weekend to start, then see if he changes his tune. After that, jail pending trial.
But if these people are going to continue playing Trump's games by Trump's rules, they can't be surprised when he continues to do whatever he wants.