UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36

Steps to reproduce the problem:
1. Create a text file give it any name, but ensure it starts with at least 1 zero width space character ​​
(​قصيدة.txt is an example, please note when I pasted this in that filename starts with 3 zero width space characters, whether these will remain once I've posted this I can't say)

2. Upload that file to google drive or somehow make it available to download again.

3. Download the file and notice that any zero width space characters that were present are now shown as underscore characters

Notes:

My actual use case for this in a .NET app. I am returning the content disposition header with a value in this format 
' attachment; filename*=UTF-8''Uri.EscapeUriString({filename}) '

In that format is works in Firefox, IE and Edge. And as I've mentioned in the steps above the problem can be reproduced in google driv

What is the expected behavior?
For the file to download not display the zero width space characters ie. '​​​قصيدة.{extension}' 

What went wrong?
The file was downloaded as '___قصيدة.{extension}'. Displayed the zero width space characters as underscores

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 67.0.3396.79  Channel: stable
OS Version: 10.0
Flash Version: N/A