They sell that combo because you can run up to 3S on that combo. The ESC itself specifically states that 4S is only for less than 2600Kv and specifically lists the 4268 size. If they meant that as the maximum size then it would have 4268 listed for the 3S rating also. It also specifically says...
Hobbywings website states that the MAX10 140A ESC is only rated to use the 4268 series of G3 motors on 4S (states this combo is for 2WD SCT, buggy, and on-road use only) and you are using the 3665 G3. Since it still runs fine on 3S Id say you're experiencing a sync issue between the ESC and motor...