Kerbal Space Program

This has been a problem since I first started using rover wheels in 0.19 (which is when I first reported it). From what I've seen, it seems to be an interaction between problems with the terrain and problems with Unity's wheel system. TohouTorpedo's Modular Multiwheels exhibits it as well. I can't recall the DEMVs ever exhibiting similar behavior, and I was using them prior to 0.19 (and before them, the Bigtrak, which didn't have a suspension and had no problems at all.)

The gist of it is that the suspension is responding to non-visible variations in the terrain, and exerting anomalous forces on the rover itself as a result. Pushing it down or pulling it up, depending on the direction of the error in the visible terrain mesh. The segments that push the rover down have no adverse effects. Segments that pull the rover up, well, it basically pulls the rover partially off the ground, probably by the same method that the Infiniglider exploit uses. This causes extreme instability and anomalous steering behavior, making rover use in area with that problem somewhere between 'annoying' and 'impossible' depending on the steepness of the terrain.

Trick being, the new terrain is VASTLY worse about it than the old. The bad segments are both more common and larger. This makes serious rover use almost impossible, because it's not a matter of IF it will get turned over and break, it's a matter of WHEN. Specifically, when you hit one of the 'pull' terrain segments on a steep enough hill.

It's not a minor thing at all, and I'm frankly shocked that it hasn't even been touched in the last several updates, despite being reported and discussed over and over and over. On a personal level, it's basically stopped my gameplay, because the severe instability this problem causes is keeping me from getting to the places I want to get to, and has done ever since I started trying to build rovers.