Did you compile it for yourself? Any problem or steps you used, I will be happy to hear, o at pack.ac or GitHub, as it is hard to follow the building here. I should prepare more documents on how to build it.
I suspect that there is a problem with the custom build. Error and speed issues are not something you see in the official build.
That was the binary download from the website. You have a build.sh for the Linux binary artifacts, but no equivalent for the windows artifacts so i did not bother preparing a windows build
Windows 11 sandbox, running atop Windows 11. Binary downloaded from your webpage.
Data being packed was an unzipped copy of linux-master.zip fetched from GitHub unpacked with windows zip, selecting skip for the overlapping case files.