Yesterday I picked up an iPhone SE and transferred everything over from my 6s. Prior to that, the calendars on my iPhone, my wife's iPhone, her iPad, and our iMac were all in sync. We have different IDs. The iMac is under my ID. Since I got the SE things are off. My SE isn't syncing with anything even though it's under the same ID as the iMac and that's syncing with her iPhone and iPad. The sync is slow, too. It had been right away but now can take minutes. Any ideas?