Multisite 4.8.1 - Menu not showing on frontend and customizer

[thordar]

In a multisite 4.8.1, if you create a new site, and then create a menu, it doesn't show up on the frontend and in the customizer.

Testscript:

• Wordpress 4.8.1 multisite (network)
• Create a new site (subdomain)
• Theme: 2017
• Go to Appearance menu -> create menu with 3 items, location: top menu
• Save menu

-> Frontend: no menu
-> Customizer: menu, without the items

You can then add menu items in the customizer, and they show up in the preview. If you save the menu in the customizer, and close the customizer:

-> No changes in Appearance menu
-> No menu on frontend

We tested this on 3 different installs. All caching disabled.

[westonruter]

@thordar is this a new issue in 4.8.1 or did it occur in previous versions, like 4.7, as well? Also, does it only happen on multisite?

I tried to reproduce the issue but I could not. Here is a screencast: ​https://cloudup.com/cAqo2pe6lT9

I created a nav menu in the backend, added three menu items to it, assigned the menu to the Top location, and saved: the menu appears on the frontend as expected.

[desrosj]

@thordar Have you been able to look into the questions @westonruter had? I was also unable to reproduce.