Update: This “solution” only works when using Quark itself, not when using OpenPlublishing. See next reply.
Original: @joel-marks I see two options to fix the issue:
The css option mentioned by @hoernerfranz (thanks I didn’t know about pointer-events) might do the trick, but I fail to find the right selector for individual toplevel-menuitems having a dropdown. Standard OpenPublishing/Quark does not add any specific classes/attributes for toplevel menuitems which have a submenu.
into: You could of course use your own preferred element instead. Hope this helps…