Fetch Records dialogue box loading problem

Fetch Records dialogue box loading problem

I experience a problem every time I try to drag the fetch records in script builder...the odd thing is that it only happens the first time I try.  When I reload the page then it works, but when I try the first time, the screen goes dim but no box shows and I am unable to do anything except reload the page.  It seems to happen each and everytime. Now I realize I need to save my work before I try to add a fetch records line, at least on the first attempt, but sometimes I forget and end up losing work. Any ideas? or is this a known problem?  (using chrome  42.0.2311.135m)