I don't know what the actual name of the glitch is, but i'm going to christen it PBE. It was recently demonstrated by Mechadino in this video:
After a little bit of tomfoolery, I found out that the collision meshes only glitch out via this method on RADs, Powered Steering Units, and all Pistons (Burst Pison, Servo Piston, Linear Actuator). The larger the motor, the harder it is to PBE.
Finally, Powered Steering Units may have a use - they could be used in the same fashion as Narmour, and provide indestructable chassis armour -

, it's better than it just sitting there. Maybe they'll have some metagame use after all! I'm not sure what the major use for exostacking Pistons using this method would be, but it might be useful to someone later down the line. Other motors may fall victim to this glitch if a more consistent method is found, but currently, the result of my test point at the motors mentioned above being the only ones that succumb to it.
Smaller chassis sizes seem to have more of a chance of activating the glitch, as does placing the component inbetween a non-glitched object, such as a battery or chassis, or within one or more of the non-glitched objects. Changing graphic qualities, window sizes, and runtime affinities does not affect the likelihood of this glitch being succesful, a lá other glitches.
Currently, this glitch is very inconsistent - there is no way to activate this glitch succesfully 100% of the time. Research into a consistent method would be appreciated. The most consistent method thus far is as demonstrated in the video, with your glitched motor inside another large baseplate component, like a large air tank or a supervolt.