Hello, now there is a right and wrong fix for the so called ”Heavy Car Bug/Glitch”.
I will be presenting solutions for this problem, but there is also one thing I would like to mention while we are at the topic. This problem isn’t bound with Psyonix / Rocket League but its extremely easy to notice this problem while playing this game, since Rocket League allows such fast inputs in terms of many other games there will be no hestiation that this fix would also lead to better performance in any other game overall.