Ok, it’s off for me as well, so trying it on now. All my profiling i’ve done have been in packaged game. Thanks for the info.
Sadly i still get the same amount of hitches with that setting = True. So i guess i have to cross my fingers that it’s getting fixed on 4.20 or 4.21 
What i don’t understand though, is why we hear so little about this issue. Seems we’re only a handfull that experience this performance bug issue?
We have a 10 page thread on the forums where we are trying to get someone from Epic to comment on it, there are a lot of people experiencing this issue (mostly people with Nvidia GPU’s).
Unfortunately I can already tell you 4.20 does not solve anything, in fact it’s even worse, 40% increase in frame times and still has the hitching issue… We’re keeping our fingers crossed this will be fixed in 4.21, but that’s months away at this point.