Video preferences interchange

In our home we have 2 computers. About a month ago something weird happened to our computers. Preference videos from the right side of the screen of my computer got placed to my wife’s computer and vice versa. It is going this way all the time. We live together over 50 years but we are not still identical, each of us has its own preferences. How can we stop such interchange?

System Configuration: Windows / Edge 97.0.1072.55