My mobile app requires that my data grid have frozen columns on the left that do NOT scroll horizontally.  This is useful when the first column might be an ID column or a Date column that the user always needs to see when scrolling through the other data columns.

Like in the WPF GridView control: 

https://docs.telerik.com/devtools/wpf/controls/radgridview/columns/column-groups

Occasionally the DataGrid horizontal scrolling does not work properly after changing its ItemsSource.  Still, tapping on any item, make it possible to scroll again.

If a tooltip is already displayed in portrait orientation, rotating to landscape causes the tooltip to end up in a very wrong location.

Provide support for lots of image formats when exporting PDF documents.

Fill color is not working in AreaSeries when negative values are given on iOS 12.

Provide a way to access the Entry control, so users can manipulate it through custom renderers/platform effects, for example to suppress the soft keyboard.

The glyphs are rendered with additional unexpected lines when a specific custom Type 1 font is used to show them.

For example page loaded event: the purpose of the event to get a callback whenever a page is loaded and the page information is available.

Support for horizontal scrolling the Pdf document in the viewer: 
Horizontal single page (go through the pages swiping/scrolling left and right)
Horizontal multi-page stacked (not possible, go through the pages swiping/scrolling left and right)

When Custom control with bindable property is added to the SideDrawer and OnBindingContextChanged is overridden inside the custom control -> OnBindingContextChanged is invoked after the OnPropertyChanged method. 

when the item is too long and it spans 2 rows in the result view. When user selects this long item and the drop-down is closed, the selected item text is right-aligned in the control. 

customize the combobox when in editing mode

1. Create a data grid with 2 picker columns

2. Bind each picker column to a different ItemsSource

3. Add some empty rows to the Datagrid 

4. Start the app

5. Select a picker value from the first column

6. Open a second picker from the other column

 First picker's selection disappears

When setting a SliderEditor for a property of the DataForm source,  currently it shows only a slider - provide a way to display the slider value as well.

Programmatically changing column width does not reflect on the UI when the width value is lower than the current width value. 

No issues when increasing the value, the UI is updated

If there is MinDate defined, for example 13th July 5:45 PM and if the user tries to select 14th July 5:40 PM, the spinner redirects incorrectly to 5:45 PM.

When the control is inside listview and the drop-down is displayed, if you tap outside of the combo, the drop-down does not close. 

TreeView memory leaks on iOS