It is possible that extra information is getting added to the Zip file. This may give you some info but not really a solution. This seems to be something others have ran into; do a quick search for “zip xrns” and you will get additional posts that look like also discuss similar issues.
I tried it on my Linux machine and I got “Unknown or unsupported file type”. I also notice that the new compressed file is roughly 15KiB smaller than the original.