Actually this issue is right from the beginning.
In BI development, Production and ECC.
What do you mean by above statement? of the issue was available in Developement then why was it moved to production?
I think there are some settings missing to update the data in Delta queue. Please refer to SAP guide to install these standard Datasource.
reactivate the datasource in source system and replicate matedata in BW system. Run an Init load abd then try to create some delta records in source system.
-swati.