Drone Bucking

I have a clients drone in my shop that is having some issues with random bucking midflight. I found the Cube body itself has some play, nothing major but it shouldn’t move at all. I’m replacing the cube to start but before I test it again I went through all parameters I have loaded on the old cube to see if something might be throwing it off such as a failsafe or a barometer setting forcing an autocorrection at the wrong time. I’m at a loss. I compared params with a similar drones params and haven’t found anything obvious. Has anyone experienced this bucking issue? I should also note there is a rats nest of wires in this drone that I’m going to clean up as well that may be causing interference.

Start by replacing the cube, as that’s a low hanging fruit…