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When pasting a large block of text into an Editor control on a Windows 10 Phone the pasted text disappears, but shows up again if you move the cursor in the editor up a line, but only if you hide a button that is next to the Editor Control during the TextChanged event handler.
Issue does not occur on PC when app is deployed to local machine or PC simulator, issue only occurs on a WIndows 10 phone. Tested on Windows 10 phone emulator 10.0.15063.0 WXGA 4.5 inch 1GB
## steps to reproduce
1. Open the test project from the link in the private comment below.
2. Set the UWP app as the startup project and deploy to a Windows 10 Phone or Windows 10 Phone emulator as noted above (I did not test on a physical phone myself)
3. Select all of the text in the top Editor and copy it.
4. Paste the text into the bottom Editor.
Expected result: Pasted text will be visible
Actual result: pasted text is not visible in the bottom editor... until you move the cursor in the editor up a line. (the text seems to be there, just not visible, but it is not because the text color is white against a white background. If I change the background color of the Editor, the text still does not show.)
I tried different containers, like using a StackLayout instead of a grid and got the same results. Tried moving the buttons to a new row in the grid so the buttons were a) not in the same grid row/column and b) not in the same row as the editor.
The only thing I found to workaround this is to not set the camera button IsVisible property to false, but instead set IsEnabled to false in the TextChanged event handler.
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Azure App Service Tools v3.0.0 15.0.30209.0
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Xamarin.Android SDK 126.96.36.199 (9dbc4c5)
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Xamarin.iOS and Xamarin.Mac SDK 10.10.0.37 (ad35de4)
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Additional note: I tried to reproduce the issue with a native UWP app using a TextBox and doing the same thing of hiding a button that is in the same grid. I could not reproduce this with a native UWP app.