Hi,
The problem also occurs in prod system 
But strangely enough it works in Q system.
The difference between the system seems to be the length of 0calday masterdata, which is used to derive 0calweek (as of my understanding).
There is no regular flow for loading master data i 0calday. (not the same as for e.g 0customer with attributes, hierarchy, text ).
Where can I check the time horisont for which 0calday is defined? I find it strange that it for prod it ends at week 09.2015, for dev it ends at 05.2015 and for q it ends at 09.2018.
There queries and flows in BW is in-sync for all 3 systems.
You mention FI team. Could this problem originate from R/3 source system?
prod
quality