We are not aware of such problem. Can you provide more details regarding your environment? Browser version, sample markup?
As for the external resource, this is our CDN. You can chose whether to use or not to use it. Here is a blog post on the topic.
the Telerik team
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 Public Issue Tracking
system and vote to affect the priority of the items.