Unread emails disappearing until refresh
From time-to-time, when I have a couple of unread emails and I select an email to read, it will open and then quickly display an email from weeks or months ago. Then when I select back, it is only showing old emails. I click the show unread emails filter button twice and they all appear normal again. It’s a bug that has been about for about 12 months and I’m using an iPhone X, software always up to date.