@enniom Hi!
#1 - I agree with your suggestion. In the next release, the numbers will be displayed outside the actual chart area, live you've suggested.
#2 - This is strange - in your video I see GUI-O is receiving invalid characters (ABV%).
After you quit the application with the command, you then open GUI-O from "recent apps" and what do you do next? Your video does not show this. Do you connect to the device manually or you use auto-connection feature to re-connect automatically?
Can you try quitting only when all Bluetooth transmissions are complete and Bluetooth is disconnected?
Best regards,
Kl3m3n