nRF5340 BLE DFU, unable to Enable Bluetooth after initial reset

We have been living with the workaround of pulling the battery after a BLE DFU update to the App core.  

Custom board with nRF5340, DFU to the App Core using MCUBoot and nRF Connect for Mobile on iOS or Android. 

The product resets fine, nRF app on mobile says Success, Clear.  However, enabling Bluetooth does not work without fully pulling power.  

Just a guess here but I feel like the Net core does not get reset in the MCUBoot/nRF Connect Reset process.  

Any ideas about this?  Search of DevZone yielded no results. 

Thank you