Hi Ciaran,
In PianoForte I activated Sliknav menu.
The Sliknav menu have submenus with arrow indications.
After clicking on a menu for a page, all of a sudden all the arrows are gone.
See the attachment.

In the attachment:
Left menu is website start.
Right menu is result after clicking. (arrows gone)

I should be more than glad if you can fix this.
If you need the Administrator.
I send you a few days earlier entrance in a DM on december 6.
Please let me know if you need this entrance again.
Regards, Milian