If anyone has this problem add a HTTP client reset at the beginning of your script. HTTP client seems to get clogged at a certain point. Issue resolved.
when I am in record mode BAS sometimes steals window focus when performing tasks.
It also steals global key binding. For example F2. When I am doing something else in other windows and press F2 nothing happens but I see browser in BAS reloads. I have multiple BAS instance opened (each in different folder) Win 8.1 64-bit
This issue is known. Corrected in the upcoming patch.