i think they are just signing in to send data like spam thats why they are in and out so fast its microsoft you need to watch with bank details and always keep your profile saved on different devices but if anyone was hacking you for any of your details theyd rob you instantly so i wouldnt worry...
I took a look at the rail and noticed that the two last pins were soldered for some reason, luckly I still had the rail of my broken joycon so after I swapped them I was able to use it attached to the console