Left AirPod pulsates when ANC or Transparency is active

Hey guys, I recently bought the AirPods 5 Wireless charging case and one month later now I’m having a weird problem with the left AirPod. I noticed it a few days ago at the gym while on the treadmill, I swiped down next to my ear (the same way you would swipe down on the stem to adjust volume) because it was itching and I started feeling the AirPod pulsating, since then I’ve encountered this issue a lot, while laying on the sofa, walking and lowkey everywhere it just starts pulsating. I’m strongly positive it’s the ANC and Transparency system because when I turned it off from my phone the pulses stopped and vice versa but I don’t know what’s causing it. Every time this issue comes I change the position of the AirPod but it starts again after a few minutes, also it’s only the left AirPod when I tried ‘recreating’ the issue on the right one it just worked normally and nothing happened. I bought them from a reputable retailer who has 2 years warranty, should I just go to them and figure it out or is there anything else to know/try? Could this be fixed with a software update? I’ve always loved my AirPods and I can’t imagine spending a day let alone a whole week without them 😂 so I’m afraid to send them because of how long it will take and also the fact that I can’t prove the pulsating until it happens and it doesn’t happen all the time.