onClick event problems with Internet Explorer 9

I am having sporadic issues with fullCalendar and the click hook in Internet Explorer 9 (this is not an issue in FireFox, Chrome or Opera it seems).

The function I have attached to the click hook when a user clicks an event will only trigger if I first launch the developer console in Internet Explorer and refresh the page. I can then close the console again and use the page as normal, but if I return 24 hours later, I will have to repeat this step to be able to use the functi开发者_运维知识库onality again.

My Internet Explorer settings appear fine, as this is not a problem with just this one machine, but also with 5 other machines I have tested this on.

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sounds like there is a console.log() included but without any code provided we can only take a guess.