File manager: Download of files laying under a folder named "sub" can not be downloaded

[mgutt]

The usual behavior is that a file can be downloaded through the download button like for example this file:

root@atum:~# ls /mnt/disk2/test/foo/
debian-13.1.0-amd64-netinst.iso

But if the file is located in a directory named sub or in any of the subfolders of this directory, the download does not start at all:

root@atum:~# find /mnt/disk2/test/foo/sub
/mnt/disk2/test/foo/sub
/mnt/disk2/test/foo/sub/debian-13.1.0-amd64-netinst.iso
/mnt/disk2/test/foo/sub/bar
/mnt/disk2/test/foo/sub/bar/debian-13.1.0-amd64-netinst.iso

Even the direct download URL http://atum/mnt/disk2/test/foo/sub/debian-13.1.0-amd64-netinst.iso loads infinitely:

I assume it has something to do with the nginx nchan api endpoint which uses "/sub" for subscriptions. Needs to be checked.

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