Incorrect order and duplicate theme hook suggestions

Just by turning on twig debug and looking at theme suggestions, you can see for the main menu (and any corresponding menu like footer) that there is a duplicate theme suggestion and at the most specific level which overrides any and all customizations in hook_theme_suggestions_alter().

<!-- THEME DEBUG -->
<!-- THEME HOOK: 'menu__main' -->
<!-- FILE NAME SUGGESTIONS:
   x menu--main.html.twig
   * menu--main--customization.html.twig
   x menu--main.html.twig
   * menu.html.twig
-->

Should be:

<!-- THEME DEBUG -->
<!-- THEME HOOK: 'menu__main' -->
<!-- FILE NAME SUGGESTIONS:
   x menu--main--customization.html.twig
   * menu--main.html.twig
   * menu.html.twig
-->