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