It’s completely normal for smoke to come out from between the lid and bowl on a new kettle, and it won’t negatively affect your ability to grill or smoke great food.
The lid and bowls on a brand new kettle often do not form a perfect seal.
Over time, the lid and bowl will form a natural seal of carbon that builds up by using the grill.
However, there may always be a little bit of movement between the lid and bowl, and smoke will occasionally escape, depending on what you're grilling.
Also, on models that come with a lid thermometer, it isn’t unheard of for some smoke to escape from around the thermometer. Reinstalling the thermometer and thermometer bezel to get a better seal might help, but over time the carbon will build up and create a natural seal which will minimize the amount of escaping smoke.
It is hard to say how long it will take for the seal to build up, because it depends on how often you grill as well as what you grill, but it will build up eventually, and in the meantime there is nothing to worry about.