The default menu tree manipulator generateIndexAndSort should sort menu items by weight and then by title (alphabetically). However if two menu items have the same weight and a title starting with the same text, the item with the longer title typically is (incorrectly) sorted before the item with the shorter title.
The manipulator uses ksort to sort the menu items. The keys consist of a fixed prefix, the weight, name and plugin id of the menu item. The addition of the plugin id is required to ensure the keys are unique, however results in this incorrect sorting.
Add two or more menu links to a menu with the same weight:
Verify that the menu links are incorrectly sorted:
Instead of using ksort() on a generated/composed key, simply use uasort().
Needs work
11.0 🔥
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
Thank you for reporting.
As a next step will need a test case to show the issue.