Hello, We ran into same issue in Development env. Once we execute workflow, data management job which execute BR was going into queue. You can find out using task details. If you have admin access then you can see all users activity.
If I remember the conversation we have had onestream team that dev has only one batch server so process will go into queue. We still having issue in dev due to limited resources and trying to work with onestream if we get larger platform.
Here is the link which you can help
Application Server Overview (onestreamcloud.com)