iOS Mail only shows one flagged email
There are at least six flagged emails but only one shows up in iOS Mail on the iPhone and iPad. However, on my MBP all of them show up in Mail as they should.
They used to show up. About a month or two ago this dropped to just one.
I tried changing the options for filtering but that didn't change anything. I dropped by an Apple store but they didn't have any ideas about this.
Any thoughts?
iPad Pro, iOS 12