Jittering turret

I have a turret that uses constraint modifiers of locked tracks. It follows a targeting cube exactly while spitting out tracers at the end of the barrel and at the other end it spits out shells.

This is what it should look like when it’s normal functioning. Though when I playback the animation I get a jittering glitchy effect as you can see in this unlisted video. I’ve checked everything I can. It happens when the object constraint influence is turned completely off and seems to not occur when particles are turned down to zero for the shells and tracers. I’ve looked through every single setting in the particles and I have no idea what could be causing this.