Maddy Leger

@mdybala:

Hi there! Yup, the Previewer has a hard time with some custom controls, so we have set it up to no longer error if it can't render them - it just won't show anything for that control and renders around it. You can read more about custom controls in the previewer here: https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/xaml-previewer/render-custom-controls

@Cklauber:

Hi Cklauber! We hear you on this, we have put some work into turning off custom controls if the previewer can't render them and just rendering everything around them so it doesn't crash. We have some docs on working with custom controls here: https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/xaml-previewer/render-custom-controls

@Alan:

Hi Alan! We are investigating that issue and hopefully will have a fix for it in the next VS release. Thanks!