Drop down text links appear already expanded in the generated help (Responsive HTML 5 layout 2017)

Hi fellow Helpers.

I am using drop-down help quite extensively in my project. However now when I generate the help, some of the drop downs are open (expanded) before they are clicked on. I've done a few experiments to see if there is a reason for this but I can't figure it out. Some of the drop down text is inside snippets and I'm not sure if this is causing the problem. I've tried saving and generating the help with the drop down boxes closed and I have got in the habit of resetting my browser history each time I view newly-generated help. It just seems pretty random to me. 

Short of resetting the drop down links to read "Show / Hide more info" rather then "Show more info" Im at a loss as to what to do.

Any hints, tips / revelations to get my drop downs display "un-expanded" when the help opens, would be much appreciated. 

Regards

john V