I am sorry, but really think that the most probable reason for this situation is the GSD File used. It might be that the Slave has certain settings to be supported for certain Modules which are not the standard type, this can not be handled by the use of universal modules.

Maybe it is a problem with the release or the version of the PROFIBUS interface used by WAGO, I have to admit, I do not know. Maybe I will have the chance to talk to someone of WAGO at the SPS and Drives Fair at the end of November in Germany, maybe they can say something about it. I will try my best.

Best regards