XDJ-RX Bass EQ Malfunction Channel 1

My channel one Bass EQ when turned down will EQ out the bass correctly for a brief second and then the channel audio will jump to EQ’ing the bass up to full while the Nob is set down to no bass My XDJ is about 2 and a half years old so it’s possible this might be an equipment fatigue malfunction however it’s strange that it’s only happened to one channel, I’m hoping there’s a way to update the equipment digitally that may sort the problem rather than paying to take it to a shop for them to open it up, Any suggestions