Dataview loading issue

I have a strange issue. I was using webix v4.0 in my project and haven’t upgraded to latest webix. I did upgrade recently and fixed most of the parts. Now the data is not loading in dataview. I am using dynamic loading. It loads fine if the total_count of the items are 20. If I make it more than 20, then it is not loading in dataview. The output giving by the URL is fine, tested in webix samples. The onAfterLoad as well as the .load both are not triggered in the above case. I would like to understand where could be the issue?.

This can be ignored.