Thank you for responding. That explains the current behavior.
It would be nice to have a ‘suspend’ function. Think Word or Acrobat or any other program. When minimized or the focus is transferred to another active program/process there is no longer any activity impinging on the system except for the memory occupied. Resuming the program/process then brings it to the forefront for access to system resources. There are programs that continue running in the ‘background’ but most of them I am familiar with allow for a pause/resume of the program by the user.