Discussed files later removed from a branch by force push do not generate notes of any change

Summary

In a merge request, if you have a discussion on some files which subsequently get removed from the changed file list, for example, by a force push - there's no note added that file has been changed, or removed altogether from the scope of the merge request.

Steps to reproduce

1. Push a branch, and create a merge request.
2. Start a discussion on a file
3. Remove this file from the scope of the branch, and force push given branch again - the file should no longer be touched and should not show up in the changed file list.
4. See that there's no note under the discussion on the file, whereas normally if a line is changed there should be a note "XYZ has changed this line in version X of the diff" visible

What is the current bug behavior?

Nothing happens, there's no note of changes.

What is the expected correct behavior?

In these cases, a note should be added that the file is no longer in the scope of the merge request.