No. It’s a recent hire with a small different mindset. It’s a simple problem, with a simple solution. I wouldn’t even call it a problem or a conflict, just diff

No. It’s a recent hire with a small different mindset. It’s a simple problem, with a simple solution. I wouldn’t even call it a problem or a conflict, just difference in expectation Be an adult and just talk to people. Explain why his behavior disrupts a nice culture you had and why this causes stress to you. If there is risk of heat and you are new to giving such feedback, the standard template is something like “I’ve noticed that you ..., which causes ... to me. Because …. Would you mind … instead.” Be sure to emphasis on your own feelings of the situation, don’t make it hostile or negative in any way. This guy probably just comes from other team culture where people turn off notifications off hours. Don’t bring your boss into this unless the pattern repeats. The message will be lost in translation and you will come of as a whiny wimp, both to your boss and your colleges.