I'm shooting with a practically new Canon 80D. Everything was going well and now my flashes are misfiring. I'm controlling my Flashpoint 600 with the trigger mounted on the hotshoe of the 80D. For some reason now it's not firing, when I hit the test button on the trigger it works everytime. I tried a different trigger from another light an the same thing. Every so often it does fire so I'm not sure what's going on.