Nothing to be worried about, this is not a bug and the message is just a
technical warning. The chkdsk conclusion is "Windows has scanned the
file system and found no problems."
Since about 2016, Windows allocates space by chunks of multiple
clusters, but it still correctly processes files
I managed to install and use ntfs-3g 1:2021.8.22-3ubuntu1 from Ubuntu
22.04 into Ubuntu 21.10. (It was usable despite failing to satisfy
dependencies, but this is not recommended and I was only doing it as a
test.) Even with that newer version, the same bug still exists. I've
reported the bug at
