Hi Siggi,
Thank you for your interest in Syncfusion products.
We have analyzed your requirement from the provided code snippet, and we are able to reproduce the mentioned issue with “Spanned Appointment rendering High density devices” in SfSchedule Xamarin Forms. Which has occurs on devices with pixel density is above 300 ppi.
We have logged an issue report on this and the issue fix for the mentioned issue will be included in our upcoming volume 2, 2016 release which is expected to be available by mid of June, 2016. We appreciate your patience until then.
Please let us know if you have any queries.
Regards,
Subburaj Pandian V