Since the issue does not reproduce when you create a new page with no template, it seems that the issue is caused by any custom logic you have on your page template.
In order to try to isolate the problem you can try to remove one by one the widgets you have on your page template in order to check if the issue is caused by a widget. Can you please also try to comment out the custom scripts in you page template, if any and test again. This way you can see if the issue is caused due to conflicts between scripts you are loading on your page template or on your page.
and we highly recommend that you use the same version in your project.
To do this, you can use the ResourceLinks
control as shown below which will ensure that the built-in jQuery library is loaded on your page or page template
<%@ Register Assembly="Telerik.Sitefinity" Namespace="Telerik.Sitefinity.Web.UI" TagPrefix="sf" %>
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