iPad sync issues

Hi!

I have an issues with syncing on my work iPad (I also have a private, same make a model, with out issues). It does sync but not every action and I can´t figure out what the pattern is. I have an iPhone, Mac, Apple Watch and 2 iPads. I have at this moment the latest update on all devices. I have tried to reinstall wich solves the problem for some time but then it comes back again. Is there anyone with the same issue?