Thank you for contacting Syncfusion support.
We have already found and fixed the reported issue with “Schedule Appointment custom view rendering” in Xamarin.Forms. The issue occurs only when the project Xamarin.Forms update version above 3.5 and it is not occurring the previous updates.
This issue fix will be included in our upcoming Volume 1 beta release which is expected be available by mid of March, 2019.
We appreciate your patience and please use the earlier Xamarin.Forms updates (3.4 and earlier) until then.
Subburaj Pandian V