(sightly) components disapear from parsys on editing in touchui "section" wrapping div missing

I have a site with components that use sightly. If I load the page in touchui for editing then all other components disapear out of the parsys upon updating a component. The blue border that is drawn around the component is also incorrect. If I look in the chome developer tools while the problem occurs then it seems to highlight and delete/replace one dom element higher then my actual component.

If I look at other components in the geometrixx site then I see they all get a wrapper div with the class section. If I understand some of the documentation correctly this is called the cell. 

For my own sightly components I can do this myself by adding a wrapping div. But when I use the title or text components from AEM I don't get the wrapping div. 

I see the same behaviour at: http://localhost:4502/editor.html/content/geometrixx-outdoors/en/activities/nairobi-runners-running.html which also uses sightly. When I update the title the rest of the page disapears.

What is going on and what is the proper way to resolve the issue?

AEM 6 SP2