Wordpress menu problem - damaged hierarchy when building a menu from product categories with 3 levels and up

[zviz]

Hi there
I'm building a woo commerce site, and I have 4 levels of product categories but WordPress menu editor shows properly just 3 levels of hierarchy. So the fourth level is not shown properly.

(could this happen because i have about 200 menu items?)

I made a screen capture to illustrate it better:

(i tried googling, asking woocommerce github and could'nt get an answer. i hope you guys would be able to help).

thanks

[SergeyBiryukov]

Hi @zviz, welcome to WordPress Trac!

Thanks for the report, we're already tracking this issue in #18282 and #19837.

[zviz]

thanks Sergey :)
i've tried installing the solution you crafted but probably missed something.
is there an eplanation somewhere as to how/where do i put that code?

https://core.trac.wordpress.org/attachment/ticket/18282/preserve-page-and-taxonomy-hierarchy.php