Open an existing button rule child.
Click on the gear icon in upper right corner of button child to go to the child's detailed info.
Goes to:
Click on the Open App link in the upper left corner to return the child's main page:
Click on Done with Button Rule to exit the button rule child
I am returned to the child's detailed info page below. Expected to go to apps main page showing my button rules.
If I click on the Apps option rather than the "Done with Button Rule" button, that does take me back to the apps list, and I can enter and leave the child normally again.