I just bought my first Samsung monitor and I was really excited to have it. However, Auto Source Switch+ is making me crazy and want to return it. 

I have multiple devices connected to the monitor. However, if I am running updates on one device that requires it to reboot while playing games on another device the monitor automatically switches in the middle of my game to the other device. This is extremely frustrating.

My previous monitors (10 year old Dell's) handled this perfectly and I may go back to them. They would only switch to a new source if the current source stopped sending a signal. Then they would auto switch to which ever signal was active. This is much better than what you have now.