This is indeed a bug. Sorry. It has been reported before on this forum and has already been fixed by our engineers and will be part of the next release.

The actual bug is that SETUP/UTILITY/COPY does not work on factory programs, producing a corrupted file that can crash the unit.

The workaround is to use SAVE instead.

There is not normally any reason to save an exact copy of a factory preset as a user preset, which is why this problem was not spotted before. It will also be present in V3.1 and earlier versions.