WebIDE doesn't preserve changes on a later re-named file

Summary

In the WebIDE, when following the same actions:

• editing a file,
• re-naming it

Only the renaming gets preserved in the created branch/MR.

Note that if the order of the steps is reversed (first re-name, then edit), the resulting branch contains the result of both operations.

Steps to reproduce

1. Open a project in WebIDE
2. Open a file
3. Edit the file
4. Re-name this file
5. Click "Commit" and create a new branch
6. Obvserve the changes in the branch: only the re-name of the file will be there

Example Project

GitLab

What is the current bug behavior?

The changes to the file get lost

What is the expected correct behavior?

Both the rename and the edits on a file should be in the newly-created branhc

Output of checks

This bug happens on GitLab.com