I'd guess something broke since it seems isolated to one side. I've had 18 tracks days with the springs and both have been around -2.2 the entire time.
Check the big nut that goes to the strut in the middle of the plate (gotta lift the black plastic cover). It might have come loose if you can twist it with your hand.
True but is that with or without a driver? Info I'm finding is it's still front heavy, 3.0, with no one inside vs 2.0
https://www.supramkv.com/threads/supra-weight-and-reduction.2356/post-248085
https://www.supramkv.com/threads/corner-weighed-2023-6mt.19843/