Came accros a video on YouTube of Th3D studio about the difference in v4.2.2 and v4.2.7 boards.

They say some 4.2.2 boards use 4988 stepper drivers which have caused a lot of problems for other printer brands as well, eg skipping steps etc. I personally have not removed the heat sink from one of my chips but if these chips are known for these problems and are indeed installed I expect we are only the top of the iceberg

I have exactly the same problem. Ordered the Ender 3 V2 just after Christmas and got it on the 28th.

As soon as prints exceed a certain size in x/y at a certain point you hear the thud and it has shifted. Mostly on objects that are square.

Everything is tight. Checked Vref voltages. Belts are running free. All axis slide freely when having the motors unplugged. Decreased flow.

Nothing seems to help. Was having such high hopes for the Ender 3 V2 as my first printer but I'm now hoping I can return it.

Kind regards