Thank you for the updated example.
Please have in mind that we will need more time to inspect it to determine why is this happening as the setup seems correct.
There is maybe a small detail missing.
I will let you know as soon as we have more information on this
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