Hello,

I have a aspnet.core app with a progress scheduler in it. When running the page without fiddler, a spinner is shown as long the data is loaded. When using fiddler jam for recording, the spinner shows for like a fraction of a second and then disappears, but the page is otherwise loading as it should. I have attached the sample project, to reproduce the behavoir, run the solution without fiddler, then with fiddler capturing. 

Regards,

Frieder

I've used this tool many times.

I tried removing/re-adding the Chrome extension, clearing browser cache, rebooting, etc.

I know it's probably not related, but I just applied the latest Telerik MVC update.

However, I've confirmed the issue in Chrome outside of any running project.