I’m afraid this is the same old problem you’ve been experiencing for a while, Louis. Dorico doesn’t work satisfactorily with the USB-eLicenser on some Macs, and yours is one of the “lucky” ones.
Please check that you are using the current version of eLicenser Control Center, which is 6.11.0.something (I forget the exact build number). And please try a different USB port on your Mac if you are able.