I have included a screen shot of our setup as well as a more thorough description. I am not sure if it is possible for the query to work for an admin but not a regular user for any reason other than a permissions issue.
- Parent object - Jobs
- Child object - Tasks
- Table component references Tasks
- Drawer Before Load: Activate & Set Jobs, JoIDName condition, Value {{WhatID}}
- Query Model: Jobs, Get More
- Components in Drawer: Model: Jobs, Context: as imaged below.