This is a Xamarin.Forms issue and not specific to Telerik UI for Xamarin. There are several threads pertaining to the issue in the Xamarin forums, this one
has some solutions that the community has found helpful.
Lance | Tech Support Engineer, Sr.
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items