If the front rebound is too loose the front end will top out to quickly unloading the rear. Tighten the front up if they're full loose. Doug
I would work on the front now, you have data from the rear to help you on both ends, my S/P car liked full stiff on the front shocks extension, going up Let us know how yours does on both ends
I'd bet the front is too loose. Tighten up the front shock rebound several clicks and try again.
Your the second to say this so I will give it a try.