Oh, I totally understand, I just wanted to check if you could replicate the issue or not with 3.8's binary. That'd tell me if the issue was fixed at some point or another.
I'm not able to replicate it with the current 3.8 binary on my machine at max spectator cam speed, so if you could grab it from here
and try to replicate it and see if you still get the stutter or not.
That'd let me know if it was fixed between 1.2 and 3.8, or if it's something with your system(particular graphics cards, drivers, etc).