Hi Thomas ,
Check if you have other standard fields filled in the comm. structure for e.g. the BOR object etc. Normally you should have process type also filled. Also if you have multiple implementation then check if this happening for this particular implementation or all implementations.Worth a OSS message I would say.
Did you make any changes to IPC ? Then just try resetting the VMC ( no connection I see but no harm in trying).
Regards,
Kavindra