@progman just checking back in on this thread. Noticed you already provided the SolOS version on reply #6 above. So ignore my last comment.
Did you try upgrading the broker? 9.0.1 is a pretty old version. You might have to upgrade to an intermediate version before going to the latest (10.3.1). If you ran into this problem on a newer broker, I’m sure our engineering team would want to take a look at your issue. 9.0.1 being so old, I don’t think we’ll get much help.