The police investigated X report and found you innocent.
The more stunts he pulls like this the more nails in his coffin.
The police will know he is being malicious and harassing you. And this builds up your case for EA / CC.
I would have a simple blunt statement ready every time for every professional who is ever sent your way. “My XH has been running a malicious campaign of abuse and prenatal alienation against me for 6 years. This another of his stunts.”
The anxiety and self doubt triggered in you by his actions is where he manages to hurt you. This will keep eroding if you don’t do more to emotionally protect yourself and you will likely tip into a depression which none of you need right now.
However you can prevent this and you actively need to look at what coping mechanisms work for you to rid you of the spiralling anxieties and thoughts of him.
You need to actively build up your emotional state - if this is 20 mins of mediation in the morning and evening, crafting, comedy, yoga, reading, singing, connecting with friends and family etc - you need to stuff your life with self compassion and self care.
Can you keep a journal of what you plan to practically positively do for yourself each day?
We have learnt through this thread that he hasn’t achieved any of the things he wanted to physically control - hence the court order and repeated police enforcement.
He hasn’t been able to fully control your oldest son, although he terrorises him - you have been able to relieve your DS of this pain by soothing and actively creating the loving, calm, kind, fun, peaceful, respectful home for him.
The only bit left is your anxiety and that is not in his control. Have a look online at mindfulness programmes and do everything you can to flood your body with dopamine, serotonin, oxytocin and endorphins.
Expect more nonsense from him and know that you can deal with it. Who knows what it will be - no point speculating, no point worrying as this just erodes your energy and strength - best to use this time to build up your ammunition and defences - which is confidence, serenity, clarity, calmness.