Hi Jonu,
Basically it bypassed the search providers, so it always assumes that you want to use a transaction code as your primary action. Normally it will first do a search until it has validated that the transaction code you have entered is in fact a transaction code. It takes a split second, but enough to launch a desktop search or try to use the browser if you just write the transaction code and press enter immediately after.
Please mark this as answered if you are satisfied with the answer.