`D:\GProgram\NConvert\nconvert.exe -out jpegli -q 85 "test.png" "test-out.jpeg"`

I am facing two specific problems:
1. The custom output filename is being ignored.
2. The conversion produces two identical images. They have different filenames, but the file size and content are exactly the same.
Is this a known bug, or is there a specific syntax I should be using for jpegli? Any help would be appreciated.