Uploaded Media with CAPITALIZED extension not found in Header Image dropdown

I uploaded Capture.JPG and Capture.jpg (both the same exact file) to a new page's media, yet only the Capture.jpg showed up in the Blog Item > Header Image dropdown.

I also uploaded a Capture.jpeg version of the file and it does not appear in the dropdown either.

@ccagle8 Have been able to reproduce the issue.

I have looked at the source code but did't find a pointer...

Considering the lack of responses, maybe when you log an issue at GitHub you might find more luck.

Thanks pamtbaau. I will log that issue on Github now that it's been confirmed by someone else