Why does the Control Rig Shape keep disappearing after I save the file and then reopen?

The Control Rig feature is unstable! I have a car model & I’m adding a control rig to the door at the correct hinge point. I create the rig, comple then save my file. the control handle shifts to the world origin. I recompile it, then it moves back to where I put it and save my file. It doesn’t move after that & it is visible in the viewport. I close the project, then re-open it. The Control Rig is now missing in the viewport and re-compiling it does not fix it. How can I fix this?