BEx Error: Key figure column shift

Hello,

we have migrated to SAP BW 7.4 two month ago. Now a user of us noticed a strange error in the BEx Web Analyzer:

We have a currency key figure "Nettowert" in column A and a count key figure "Bel.-Pos." in Column B.

Depending on filters or hierarchies there are count values (174) in a currency column (... EUR) and the other way around:

[Screenshot]

I have not noticed this before. The effect is reproducable, but seems to follow no logic at all.

Has anyone see such a thing? It this a SAP BW bug? Is there a workaround?

In hope for responses and with best regards

Thomas