I was shooting an event last night and I was getting a significant lag between pulling the trigger and when the E-M1 would actually fire when in TTL-A. So much so that I stopped to check if I'd accidentally slipped into a 2 second timer mode or something. Same flash unit on my E-M5 fired immediately as expected in TTL-A... I've scrolled through the menus and everything seems to be matching between the two body's settings. Any idea what I'm missing?