ferry23, it sounds as if there might be a fault, as mine is a Lakeland dual drawer and it doesn’t cause any issues. You can find the operating instructions on line either by googling Lakeland air fryer and the model number, or going onto the Lakeland site, finding the fryer there and downloading the instructions if you haven’t already done so - this might give you a clue about why it might be smoking, plus it explains all the different buttons and how to use them.
What I would suggest, though, is contacting Lakeland as they have the no quibble 3 year returns guarantee, so that you can either exchange for another Lakeland model, choose a different brand or get your money back.