Something binding

[tellor]

Hi, when my rear wishbones are fully compressed something is binding and I can't seem to find what it is
I first thought, well I'm never gonna get in this position anyway so why bother. But actually putting the car into a high grip corner compresses the rear wishbones/shock so much it binds and gently pushes the car back up

Easiest way to try is press your car down (as to bottom out) and gently push it forward....and mine try to push itself back up

Shocks all ok, driveshafts all ok, not touching rear shock tower either

Tried lengthening/shortening caber links....still does it

Any suggestions please guys?