See issue https://github.com/rordenlab/dcm2niix/issues/495
This describes the error in the Canon classic DICOM files and a desperate kludge in dcm2niix 1.0.20210317 to handle these mangled images. This seems like a clear contravention of the DICOM standard. Please report this to your Canon Research Collaboration manager to have it resolved. Based on this issue and the issue with diffusion tensors, I strongly urge users of Canon MRI systems to only export to enhanced DICOM. This is a limitation with the classic DICOM images generated by this system, not my software.