I need some advice ladies!

I have a 4 year old son and for the past 4 years my son’s father has been extremely difficult. We had a nasty court battle for the past 3 years. I have legal primary physical custody and his father has visitations. We haven’t been to court since last May. To get to the point, lately I have been feeling like he has been disregarding our custody agreement. Earlier this month he was to pick our son up for spring break and failed to do so. He didn’t call, text or let me know prior he would not pick him up. Not only did it hurt my son’s feelings it was very unexpected and I had to find a sitter due to me having to still work. Fast forward this Wednesday I heard him on the phone tell my son he can’t wait to show him his new room. Our court order states he has to send me his new address within 24 hours of changing it. We’ve had this issue previously in court due to him refusing to do so. It’s been past 24 hours… This Friday morning I seen he posted photos of his keys and new apartment…I kindly asked him if he had a change of address. He replied “I will”. Im not sure if he knows I saw the post… and I’m sure if he posted keys and a new apartment it’s a change. I really don’t want to make things difficult but i feel like he’s being very nonchalant. He’s not the best to communicate with, he either ignores or becomes extremely verbally abusive. Should I go to court for these issues? Or leave it be. Or what would you do?