The voxel size are different for BOLDref

Summary of what happened:

After preprocessing my datasets using fmriprep, I obtained three different results(as shown in the Screenshots): visually, there are differences in voxel size between BOLDref and the results, leading to variations in the images in standard space…

Command used (and if a helper script was used, a link to the helper script or the command generated):

/…/input dir.
/…/output dir. 
--participant_label xxx 
-w /…/working dir. 
--fs-license-file /…/license.txt



Environment (Docker, Singularity, custom installation):


Data formatted according to a validatable standard? Please provide the output of the validator:

Certainly, yes

Relevant log outputs (up to 20 lines): the log files are all the same between the three results

Screenshots / relevant information:

(One image displays the reference image and standard image information of a subject)