RM 9.8 Deep Learning Extension error

I am trying to run an included Iris classification with Deep Learning 1.0 extension, ND4j 1.0 with GPU and RM 9.8. Every second run I am getting DL error "SEVERE: Process failed: The provided training data couldn't be parsed correctly. Please ensure that all attributes (except the label) are numerical only." I ensured that the process is 9.8 compatible and I removed the nominal ID attribute. However, it not alter the error until I changed the data split at which point it started working. The error came back when I modified the DL settings (any, e.g. the epochs or learning rate), which again improved itself when I modified the data split. It is persistent. I suspect it is a bug in the extension.