This is not so much a dcm2niix issue as me trying to debug some DICOM transfers in our systems. But we have a DICOM file that works great with dcm2niix v1.0.20200331. But when we transfer it to a different system, something goes awry and we start getting this:

Chris Rorden's dcm2niiX version v1.0.20200331 Clang11.0.3 (64-bit MacOS)
Found 1 DICOM file(s)
Please check slice thicknesses: Philips R3.2.2 bug can disrupt estimation (720 positions reported for 360 slices)

And a .nii is produced that is shifted in space by 1/2 voxel in X and Y compared to the one that gave no warning.

But, I can't find any differences in the geometry fields in the two files that would explain this. I was wondering what the logic is that leads to this warning and/or what I missed in terms of geometry data. Files are here - these are phantom images that can be shared:

https://www.dropbox.com/sh/5oj5ytjxmen3t13/AADtPEdjvcL8KDd1xQVdnzZga?dl=0

Thanks for suggestions if this rings a bell!