SystemUser With Id Does Not Exist - Team

Hi all,

I am trying to get a workflow to run on a record whose owner is a Team.  When the record owner is changed to a user, the workflow runs, but when the owner is a Team I get the following error and the process gets stuck in 'waiting': 

SystemUser With Id = xxxxx Does Not Exist

As soon as I change the owner back to a user and retry the workflow, it works.  I have ensured that the owner may be of type Team or User for all related entities, and have made sure to share the workflow with each team.  What else could I be missing?  It seems to me that D365 is expecting a user as owner, but I cannot confirm.