I had a quick look, nice progress!
One thing I noticed is you’re testing against 2.12.3 mm-halow-driver/lib at main · micropython/mm-halow-driver · GitHub
As before, I would strongly recommend updating to 2.13.1 as there was some significant improvements around the chip incorrectly passing up traffic that is not intended for the host. I wouldn’t be surprised if this is impacting this exact issue you’re observing! Morse Micro MM-IoT-SDK release 2.13.1 · MorseMicro/mm-iot-sdk@d637247 · GitHub