Weird interaction with directory containing "#"

[multimikael]

Description
No problem when entering a directory "name #1", but can't enter a sub-directory.

Expected behaviour
"#" is converted to %23 in URL.

What is happening instead?
"#" is converted to %23 in the URL upon entering directory with "#", but converted back to "#" when entering sub-directory. Manually replacing # with %23 in URL fixes the problem.

Additional context
Example:
filebrowser.com -- Root
=> filebrowser.com/files%231 -- "files#1" is converted to "files%231" in URL.
=> filebrowser.com/files#1/subfolder -- "files%23" is converted back to "files#1" for some reason

How to reproduce?
Can't create a folder with "#" from FileBrowser for some reason. (should I create another Issue?).

Create Folder with "#" => Create a subfolder => Enter Folder with "#" from FileBrowser => Enter subfolder from Filebrowser

Files
None