Hi Ciaran,
I encountered a very strange issue (maybe a bug) in SKYLAR template with nested menus. The strange thing about it: The issue only appears for one menu item.
As you can see in Menu_Issue_Pic1.jpg, I navigate in the top menu via "Politisches" - "Windkraft" to "Die Planung". Up to now everything seems to be okay. But when I try to go down to the next menu item "Die Simulation" the menu on level 4 (from "Standorte" to "Wind-Messstation" suddenly jumps to the left as in Menu_Issue_Pic2.jpg, making it impossible to navigate to the subsequent menu items.
I have other deeply nested menu items, but the menu items under "Windkraft" are the only ones to show this behaviour.
What I found out in addition: If I use the very leftmost edge of the menu box -so that menu item "Die Planung" doesn't get the focus-, I can navigate correctly.
The issue doesn't depend on the browser. I've tested with the current versions of Firefox, Chrome, and Edge. Once even the browser tab in Firefox crashed.
If you would like to see the issue yourself, I can temporarily grant superuser access to you.
Best regards,
Rolf