I've noticed that with you set EnableAutomaticLoadOnDemand="true" and Filter="StartsWith", when you select one of the items and then start scrolling it starts filtering out all the other items and the message box shows incorrect counts and allows you to continue scrolling until you reach the count it mentions.
It's kind of hard to explain, but you can see it being done on your demo page:
http://demos.telerik.com/aspnet-ajax/combobox/examples/loadondemand/automaticloadondemand/defaultcs.aspx
If you open the drop-down, select one of the options and then open up the drop-down you'll see the issue I'm referring to. It starts clearing out the other items, but still allows you to scroll.
I have to assume this is a bug with the AutomaticLoadOnDemand feature.
It's kind of hard to explain, but you can see it being done on your demo page:
http://demos.telerik.com/aspnet-ajax/combobox/examples/loadondemand/automaticloadondemand/defaultcs.aspx
If you open the drop-down, select one of the options and then open up the drop-down you'll see the issue I'm referring to. It starts clearing out the other items, but still allows you to scroll.
I have to assume this is a bug with the AutomaticLoadOnDemand feature.