They are all the same!
My ex never, ever wanted to attend parents evenings, took no interest in the kids’ homework and was deliberately sabotaging of their grades.
When Cafcass became involved, he suddenly pretended he was interested in attending parents’ evening, and tried to say I hadn’t told him when it was ( hadn’t he heard of phoning the school? I had a non-mol against him at the time!).
Well, the school added him to their system, told him when the next meeting was- and he has never attended even now. It was all a game.
Your ex may not even turn up this time. He may be just trying to cause you fear and unrest. If he does, avoid eye contact and make sure that next time he is made aware that you need to go at separate times.
You can inform the school of this plan of action for the future X