Hi Bill,
My assumption here would be its due to SSL configuration on the partition, this might be different settings or setup between the partitions. Perhaps check the differences between the host servers that has SSL applied.
The other thing that is a bit annoying that I have experienced on RDI 9.8, if you first connect on the "green screen - GUI like" signon screen , it auto accepts the SSL configuration which one has to turn off in some obscure places to get back to non-ssl connections.