Date changing issue on speedy

Hi, I'm new to the forum and new to luxury watches. I have recently bought a Speedmaster Prossional Moonphase Ref: 35765000.

I'm wondering if anyone here can help me out with a Date change issue. All the idividual dates work as you expect them to changing over at midnight by themselves except the 23rd it will not change over to the 24th by itself, only way to do it is by using the pusher. Any ideas what is causing this, is it normal for one day of the month to need changing over manually with the pusher?

I did send my watch over to omega with this exact problem but they sent me it back saying there is nothing wrong with it. But if they just checked the dates change ok by using the pusher they wouldn't see any problem with it.

Any help on this matter would be appreciated, I don't really want to send my watch off for another 1/2months unless I really need to.

Thank you in advance.

This may be a tough one to answer, but does pushing the pusher engage a different mechanism then would automatically engage at midnight?

so the pusher could work even if the date star had no teeth at all?

great video thank you. seriously basic stuff there - I gave it way too much credit.