my warranty is just basic 1 year warranty. bought this laptop and arrived on last year September. first noticed this issue after 1 month i think.
when i was listening to Spotify, its audio stuttered. u can refer to my previous post with a link to watch the example of my stuttering. i thought was audio driver issue and i updated audio driver, but it didn't solve it.
i took a few months to realize that actually its not audio problem, its stuttering because my screen also stutters. until december only send to service center
this stuttering occurs randomly and not frequent. it could take up to 1 week+ to occur again. so its really hard to record it.
no, i didn't experience laggy issue. it was really smooth with 6 core cpu, but just the stuttering.
big difference between mine and ur laptop is amd vs intel. i am not sure if my amd r5 5600u is due to amd confirmed stuttering issue regarding to ftpm issue.
for ur laptop on intel, I'm not too sure the cause of it. how is ur stuttering like? got robotic audio or just screen stuttering ? does it occur frequently? if yes, then record a video then contact ur nearst Lenovo sc for warranty claim. let them find out the cause of the problem. if u dont record a video then they might refuse to replace parts if required due to no evidence. its safer and prevent yourself to end up wasting 2 weeks, like me

if your laptop lags, stutters frequently, try to monitor ur cpu, ram usage. u can use xbox game bar/ task manager to see ur laptop's situation. see got spike in cpu usage or not.
well if you could record a video then it would be whole lot better if u need help with diagnosing the issue.
Thanks for the reply. Yeah, I saw the video. That's how I realize we have the same problem. I was just ignoring it at first because it only happen occasionally, the robotic type. The lag part is the one that finally gets to me and decided to check this laptop section. Will start to read up on the internet if anyone facing the same stuttering and lag issue. Great that you get a full refund for yours. Are you getting another laptop from Lenovo or checking out other brands?