Avast Private Browsing

I love the app for private and secure browsing but i have noticed since the update a month or so ago, now everytime i switch back n forth, it pops open a new browser window. im assuming this is a bug but curious to know when this will get fixed bc i do all of my banking and many times i switch between my desktop and the private browser and starting to get annoying to have a dozen windows open.

thanks

chris