Custom folder [post:title] Case sensitive

Hi!
I’m testing the custom folder feature in a gallery.
Since my title start with an uppercase letter, that makes the url path to have that uppercase letter too (site.com/custom-folder/Title/image.jpg)

I’m not comfortable with that because the lowercase version of the url gives a 404 error. I understand there shouldn’t be a reason for that url to change, but I’d be much more confident if all urls would remain lowercase.

Is there a way to achieve this and make the folder always lowercase?
Thanks in advance!