Main item in Global menu nulled if Sub item added
Not sure if this is isolated to WordPress but I doubt it but here is the case scenario:
I have a main Global menu with different links. (Home, Ads, Contact, etc.)
All links work fine at this level.
When I go in Appearance/Menus and add a Sub-Item under any of those main links, the main link becomes nulled (points to #)
I tried adding the sub-item menu under a different Global item and same results, it nulls out the Global item's link
Ovidiu, I removed the sub-item for now and placed it in the Global menu, but if you can replicate it on your end to confirm?