The issue that I'm talking about happens on random jobs and keeps happening on those specific jobs even when I log out and log back in. The issue is when I 'drag & drop' a job it doesn't move from its original position and also when I try to drag the lower end of the job to increase the duration that won't work either but surprisingly when I open up the form and do the updates that works just fine. I have attached a screenshot which displays the error that I get in the console log.
It would be great if you could shed some light on this topic. I would be more than happy to accommodate a web-ex call to demonstrate this error to you.