Created attachment 17983 [details]
Extra icon on TabbedPage in iOS 10
This is due to a bug in iOS 10, more information available here:
If the "Title" property is changed on an item in a TabbedPage, it updates the Title property on the TabBarItem (see https://github.com/xamarin/Xamarin.Forms/blob/master/Xamarin.Forms.Platform.iOS/Renderers/TabbedRenderer.cs#L188). This causes an additional icon to display (see attachment). Since the Title property is changed during binding, this means you can't bind the ItemsSource for a TabbedPage without seeing this extra icon.
For historic purposes, here's the commit specific link where I think the bug is (instead of tracking master):
There is a PR for this: https://github.com/xamarin/Xamarin.Forms/pull/448
Isn't this iOS10 beta bug ? I can't reproduce this issue in current iOS10 version.
Here's my reproduction code:
I can see it on my simulator and on a real device both running release versions of iOS 10, so it's not just a beta bug.
I have provided a minimal repro on the linked PR. The important thing seems to be changing out the collection that ItemsSource is bound to.
new PR https://github.com/xamarin/Xamarin.Forms/pull/720
Should be fixed in 2.3.5-pre1