I used the custom CSS code from Tom’s Docs with “open-left” custom class for Sub-Menu item “About Orly -> Media”. It has been working until tonight (that I first noticed). Now it isn’t working. I’ve double-checked everything, tried it with other sub-menu items, but nothing works.
I deactivated all plugins and removed all other css, but nothing changes.
Do you have any plugins or functions that affect the Menu output? i am seeing an additional attribute data-wahfont="16" being added to the menu item anchors – wonder if the cause of that is affecting the additional class being added.
The source of that attribute is WP Accessibility Helper. I had originally deactivated all plugins before submitting this post, but I just deactivated again and it doesn’t make a difference.