So I got a weird one. I have an XF and use Broncolor Move battery generators. I decided to use the 120mm today (its brand new to me) for some team headshots and as soon as I switched up from my 80LS to the 120FPS the XF would not trigger the transmitter. Manually push the test button, works fine, trigger the shutter, nothing..tried my 55,80110&150 LS's..they all work. Oh and the 120 just came back from Japan to be serviced...Loose wire in the lens??