Drop down text is already opened when i view help (HTML5 RH2017)

Hi guys and girls and everybody else

I'm using drop down text boxes quite extensively, to Show / Hide lengthy field descriptions tables. They're a great way to remove screen clutter and hide info which some may not need and which may be glaringly obvious to other users. 

Trouble is, more often than not, when I view the published help files, they are already expanded, showing the abovementioned lengthy field descriptions tables. (TOP TIP: My workaround has been to annotate all of the drop down links "Show / Hide field descriptions table" so it looks like I've done it on purpose 🙂 )

I've tried various things to get them to close, including physically closing them and re-opening the help; checking they weren't "expanded" when I last saved the page or published. And a few freaky things involving chicken sacrifices and dancing naked in the garden at midnight. But all to no avail. 

Has anybody else experienced this issue and is there a fix? Am I doing something wrong when I create drop down text items (They mostly contain tables)? 

Answers on a postcard pls.