Thank you for reporting a bug to Unity.
We have reviewed the issue carefully, and in this case, the team is unable to prioritize fixing this bug.
In Version Control, as a regular rule, we do not interfere with the content provided by the users. That being said, a before-checkin trigger might be used in this case to check the file/folder names are correct and supported.
Take into account that the renaming you can see in the Editor (:::) is not real, but an intermediate solution to allow accessing the content from the editor.