Так, откопал ноту 1736332 (как раз ошибка затрагивает только EHP6).
Цитата:
Symptom
The system does not update the cost component split generated by the actual price determination, the planned price iteration, or by a change in the plan price.
Other terms
KSII, KSPI, KP26
LKAIVF05
Cost component split
Reason and Prerequisites
There is a program error.
The error occurs only if a cost component split is entered in version Customizing. The cost component split is determined correctly and can also be displayed using the menu of the result screen. Only the update does not work.
Solution
Implement the attached source code corrections.
Будем проверять.