Preferred dimension not preserved in REST API

I am trying to replicate the example given in the bootcamp: https://gitlab.opengroup.org/osdu/osdu-bootcamp/-/blob/main/OSDUBootcamp_Amsterdam_FY25/Labs/OSDU_Bootcamp_Labs.ipynb?ref_type=heads

After committing the transaction, the 3 items and 1 bulk data array are available in RDDMS. When querying the array, the preferred dimension is empty. I expected the preferred dimension from the input to be preserved.

PointSet_Meta-Data.json

PoinSet_Data_Arrays.json