Notes API for issues no longer returns label additions/removals
Summary
The Notes API for issues would, until recently, return all comments and activity that would show on an issue's webpage. This included user comments, title changes, description changes, label changes. Some time in the past week or two, label activity is no longer returned by the API. I cannot find any way to get this information anymore.
Steps to reproduce
Make an API request for the notes of an issue that has label changes and see that the label changes are not included in the results. Example URL: https://gitlab.com/api/v4/projects/{project_ID}/issues/{Issue_IID}/notes
Example Project
I am experiencing the issue with a private gitlab.com project.
What is the current bug behavior?
Issue label changes are not returned by the Notes API.
What is the expected correct behavior?
Label changes are included as notes with a body similar to "added ~2163654 removed ~543423" where the numbers are the IDs of the labels.
Relevant logs and/or screenshots
N/A
Output of checks
This bug happens on GitLab.com