Search by Tab Key in Chrome

I can see the option to search by pressing Tab Key

However, When I use Tab key to search (and press enter after search term), it queries “?email=”, therefore search is not triggered. (While it should have used “?ap_s=”)

I read somewhere, that it can be personalized from chrome itself, but that would not solve it globally. Is there any way to make it work?

Edit 1 – Strange, soon after I posted this question, I retried, and now chrome started search using “?ap_s=”. And now it appears to be working. Don’t know why this happened?