It is hard to describe so attached is a screen recording. I reloaded the game and the bug still occurred. There is a 3x12 thruster that has a 3x1 thruster on a SV attached, when placing the regular thruster on to them I noticed the glitch. Now it is happening anytime I click and drag to place thrusters. It is in a creative world type. Idk if it will happen on survival. Video: