Have you tried running the engine in 4.2 after the 4.3 update to see if it still runs smoothly? If not, please try running it in 4.2 again to see if the hitching occurs.
Have you tried running the engine in 4.2 after the 4.3 update to see if it still runs smoothly? If not, please try running it in 4.2 again to see if the hitching occurs.