I just noticed that when my Macbook 12" (2016 M5 model) is turned off and I connect the Apple USB-C Digital AV Multiport Adapter (where my charger is connected to) to my computer, the power chime is heard and on screen it shows battery 100%. However after 10 seconds or so the sound is played again and the image is shown too. This just goes on and on till I turn on the computer or take the cable out. I can not imagine this is normal behaviour. Next to this I don't have any problems and the battery lasts for over 10 hours. Has anyone else experienced this? It only happens when the computer is turned off and I put the cable in. When turning the computer off when the cable is in, it won't play the chime.