Static Shock Disconnecting USB C Device

The problem is you 🙃

You're the one building up an electric charge by moving around a lot on effectively insulated surfaces. You discharge yourself by coming into contact with conductive things with a dissimilar charge. That sudden unrestricted surge of current is causing the spontaneous disconnection.

If you and your equipment all had the same charge there would be no sudden discharge or what most people call "static shock" or carpet shock. So the idea is to equalize all of those dissimilar charges before coming into contact with sensitive electronic devices.

When you work with sensitive electronics it's common to wear a wristband like this

It allows for a conductive path through a high resistance (something like 1 megohm) so you don't damage static sensitive electronics if you were to become charged by moving around on various nonconductive surfaces like carpets or upholstery. The alligator clip connects to "ground" which is defined as a reference point for zero potential.

That particular solution might be impracticable for a DJ, but perhaps it will give you an idea of what to do. Different shoes are another good idea along the same lines — whatever you're wearing should provide a conductive path so that you don't become charged.