"Switch to window" doesn't work

Hello,

I created a new test in which I click on a button and a new tab opens. The recorder created a new step : “Switch to window 1”. However, when I’m in this window, TestProject panel is freezed and I can’t do anything on it. Even when I play the test he failed because I ask it to check new tab’s URL and it checked actual tab’s URL.

How can I fix that ?

Update the subject. No idea how I can fix that ?