Unfortunately, that sounds like a static electricity issue that many teams experienced right after introduction of V5 system, in the fall, when schools start turning on building heating systems, thus resulting in dryer air that allows faster accumulation of the static electricity charge.
For example: Two Dead Ports In 1 Day, V5 port burnout, Broken V5 Ports... and How to Fix Them!
Does your school just turned heating system on and do you have new anti-static tiles from VEX or still use old tiles without applying anti-static spray?