I have three EM5s and three Fl600Rs. Really GREAT combos but there is a problem with one flash. When I turn the camera off, the flash turns off also as is designed and when I turn the camera back on, the flash turns on; however the flash will not fire until I use the flash on/off button to turn it off and back on again. Not so with the other two set ups. Any ideas? Operator error? Be kind, I am old.