JavaScript's try-catch is failing on typeerror

Just saw this error today on our application. We have a small box on top right of the webpage. It gets updated every minute. What it does is make a jsonp call to each of our hospital partners via intranet and pulls the latest news. The issue doesn't happen often. I actually found out why the error is happening.

Uncaught TypeError: jQuery11020382352269484832883_1441911920555 is not a function

This error shows up in console when a jsonp request doesn't get the response from the jsonp service within the time assigned on the jsonp timeout.

I wrapped our endpoint call with try-catch but it is still spitting out that error. I want to get rid of "Uncaught TypeError" and display our own custom error.

via Chebli Mohamed