i'm having this same issue. My XB1 Controller keeps wont stay connected/ keeps disconnecting/ keeps blinking/ wont sync or whatever that means. And connects randomly.....im not crazy i swear. Like right now the battery is at 100% and it just keeps blinking and blinking and will randomly connect for a couple seconds and then go back to blinking. I've tried pressing the "sync button and simotaneously lettin go of the button on the side of the XBOX and they just both end up blinking really fact and it doesnt do anything

Please someone help me or message me back