Invalid name for theme suggestions

We have an antoher with hook_theme

bundle.html.twig not working because bundle is not defined in subentity hook_theme

When I try in my custom module, I don't have all suggestion

/**
 * Implements hook_theme().
 */
function MY_MODULE_theme() {
  return [
    'bundle' => [
      'render element' => 'elements',
      'base hook' => 'subentity',
    ],
  ];
}

I can reproduce but i'm able to use the good TWIG template by using this : subentity--<subentity-machine-name>.html.twig
If i have a specific display mode, i can also use : subentity--<subentity-machine-name>--<display-mode-machine-name>.html.twig

Example :
- if my subentity id is "tab_homepage", i can use subentity--tab-homepage.html.twig
- if my subentity id is "tab_homepage" and use the display mode id "header_top", i can use subentity--tab-homepage--header-top.html.twig

Maybe it can help waiting for a patch.

;We need also alert of the templates suggestions change.

This patch replace the prévious. But I found that is not suffisent.This patch replaces the previous one. However, there is still an issue with patch #4: while we do get the suggestions, the template is not being applied. Needs work.