Automation Export Rear Suspension Bounce Issue

So I exported a rwd sports sedan (Something similar to the Dodge Charger SRT 392 and Hellcat models) to BeamNG and I can't seem to get rid of the rear end bounce, like driving over continuos bumps only when stopped. I've cleared the cache, softened the rear suspension in Automation, and the rear ends of the cars still bounce. These are the only cars that do this, all my other cars are fine.

The cars in question have single coil rear suspension, active sport springs, semi-active dampers, and passive sway bars.

 

Cool, many thanks Goosah! Editing outside of the game(s) isn't exactly my forte so I'll patiently wait for the next Automation update.

 

Hello, COVID lockdown finally made me bite the bullet and buy automation... I'm trying to do something funny with the "50 HP racers" but i'm facing the same problem.
I'm exporting a 380 kg mid engine car and the rear suspensions keep collapsing upon spawn.
I tried everything above (I wasn't able to find additional guidelines online), so I changed ride height, spring stiffness, tyre width, suspension scheme (pushrod and DW), even engine orientation (mid transverse and mid lingitudinal) but nothing changed.
So I tried with Jbeam (firts timer here too), i found the lines indicated abouve, tried moving them a bit (they are not exactly the same, i think for the different suspension layout thant the OP) but wasn't able to fix it. I even tried playing with breakgruop and disable mesh break (just by instict, because I don't know what they are and I tried to search them but apparently I'm way behind in the learning curve to understand specific parameters...)
Apparently this bug is not completely fixed, but can anyone help me navigate through it?