... and liked the improvements from both over 2018.50.6 to everything except TACC / AP@ phantom braking - it is very glitchy, making minor jerky speed changes almost constantly if there is any traffic nearby.
... and yet for others (like myself) we see none of this 'glitchy' behavior and it is all just smooth as it should be...
No idea why, but take some comfort in the fact that the problem you see is not something everyone is experiencing.