If there is something additional here I can do, let me know.
Thanks for investigating.
Hello @ArneStein 
Have you tried to use the models @Sliman_Medini provided you with ?
We have already tried three times to reproduce but we could not. As it seems to work on lumber 3.6.8, I would really recommend to use the working models if they suit your needs.
we will keep on eye on your issue of course, but for now you could go further and bypass the model generation issue 
Steve.