Why do the values obtained from exporting data using Python differ from those derived through post-processing probe values?

hello everyone!

problem:
When exporting the final frame output of element 1 using Python, I observed that the data for the INTEGRATION_POINT and CENTROID remained consistent across both export methods. However, the data for the ELEMENT_NODAL was inconsistent.

my python program:
element_node_ele1 = part_instance.elements[0]
fieldOutput = odb.steps['Loading'].frames[-1].fieldOutputs['SDV2']
subset = fieldOutput.getSubset(region=element_node_ele1,position=ELEMENT_NODAL)
# INTEGRATION_POINT,ELEMENT_NODAL,CENTROID
for value in subset.values:
   print(value.data)