WiFi Connection Problems caused by Bluetooth?

Hey,

My MacBookAir Mid 2013 has some WiFi connection problems from time to time. However from my point of view it becomes extreme when I connect my Magic Mouse via Bluetooth. The rare thing is that the internet is not "disconnected" as the connection sign shows full signal strength, but it becomes impossible to load e.g. browser pages.

My question is: Does anyone know this kind of problem and knows how to solve it? Is it possible that the Bluetooth signal and WiFi signal are competing and affecting each other?

best

KW