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hi, I was having the same problem. For me the key was that the distance was too short.
"To use this parameter, set the Witness Line Control parameter to Fixed to Dimension Line. With these parameters set, additional snapping is available that aids in stacking linear dimensions at even intervals. This value should be greater than the distance between the text and the dimension line, plus the height of the text."
Even with the same values in different files, if the distance is on the limit, it worked in some cases and in others don't. (i guess is that).