u/Equal-Building3292

I know this question has been asked multiple times but I still can’t figure it out. I just bought a brand new Husqvarna 435e series chainsaw like 5 months ago and when I was using it 2 weeks ago I noticed that after I used it for a few minutes that chain still moves when I let go of the throttle and it was in idle. When I say it moves I mean it fully spins as if it has some fuel going to it. And it’s been doing it ever since. I tried adjusting the idle screw which has no effect, whether it’s loose or fully tightened the chain still moves the same. The springs are still good and the clutch looks like it’s good. I’ve seen that people say it could be an air leak. If it is an air leak where should I look first? If you think it’s something else please let me know.