Menu items at 3rd level and deeper don't respect the order set in WordPress

[o-lie]

Describe the bug

What's happening:
When you reorder menu items in the WordPress admin, the changes are reflected correctly for level 1 and level 2 items — but level 3 (and deeper) items always appear in the wrong order, no matter what you set in WordPress.

Expected:
The menu renders in the same order as configured in WordPress, at all nesting levels.

Steps to Reproduce

1. Create a nav menu with at least 3 levels of nesting
2. Add a few items at the 3rd level
3. Reorder them in the WordPress menu editor and save
4. Check the rendered menu — the order hasn't changed

Screenshots, screen recording, code snippet

No response

Environment information

No response

WordPress information

No response

Code of Conduct

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[rubberTres]

Same here