Setting Beam Z Justification To Bottom Raises Beam By Offset

Revit
,
1

Hi all!
A weird action is happening when I am setting a beam that is place on a floor, setting it’s z justification to bottom. The beam has a section of 20/50 and when z justification is set to top it is placed properly (beam top is aligned to floor top) but when I set it to bottom it is then offsetting the beam by 200 cm.

z justified to top

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image1036×668 22.9 KB

2

z justified to bottom

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image933×658 29.2 KB

3

what is the question?
have you checked the family for unwanted geometry that may be not visible?