Buyers of Nintendo’s current flagship gaming console have seen problems where the Joy-Con controllers (usually the left one) register input when there is none. So, a character or target may start moving even though you’re not using the analogue stick.
This is obviously a flaw, but Nintendo has been fairly tight-lipped on the issue and has only offered to replace faulty controllers in some countries like the US, infuriating some gamers who have had to buy replacement Joy-Cons instead.
Back in September the Switch Lite was added to the ongoing lawsuit against Nintendo, suggesting the issue is in the unibody version of the console and not just the original that has detachable Joy-Cons.
It is thought that the design of the controllers wears internally over time, causing false inputs in some instances.