maybe an update changing hover power make these tech flying now , but not when they was created by their builders ?
I’ve gotten a Hawkeye tank with the same bug, and it’s that they can not control it or anything so as a result I’ve seen a few just begin spinning at near light speed.
Most of these techs that float when they shouldn't still do have some control, due to all pads now having vectoring of their forces. But they generally don't have enough gyroscopes to stay fully stable, and are top-heavy, so tip. Also too few thrust sources to move in an assertive fashion, of course. One of the techs above (this battleship) is arguably acceptable, in that it apparently has some fans to turn and move it. So maybe it *was* meant to float a little, with the wheels just there to avoid damage from ground collisions (but it still looks kinda weird):