Hi rithika,
Actually sap itself never recommended to use dso before your info cube for inventory extraction.
as you said its full load, then is it possible delete and reload data to DSO(if you have less volume of data)? if yes then once load the data to dso, recheck your data issue(blank cells). if not there then load data to info cube.
As we seen, all mappings are one to one, direct mapping. so its weird behavior. unable trace the cause.
Recently we came across the same issue at dso to cube level(for BPC). i deleted the data from cube and reloaded. it worked for me.
Thanks