Path alias for entities only work for one language when it's selected to not be translatable

Problem/Motivation

Step to reproduce

• Install Drupal in English
• Add another language and enable content translation
• Make a node type translatable and select only the title to be translatable
• Create a node in english and add a path alias
• Add a translation (note that the path alias is displayed from the original node)
• Try to view the node using the path alias (only work on english)
• Edit the translation and edit the alias
• Try to view the node using the path alias (only work on english)

It's exptected that when the path is non translatable, that the alias should work for all translations.

I've uploaded a video illustrating the error.

Proposed resolution

We need to make it so, that the path alias works for all languages when the alias is selected as non translatable.

Remaining tasks

User interface changes

API changes

Data model changes