Has anyone else experienced problems with firing a test flash with an external Speedlite attached to a switched-on EOS M5? I've tried with: 430EX II, 600EX-RT and a Aodelan E3+ transmitter. What I have found is test flash always works with the body switched off, but when on...
- It never fires from the transmitter.
- With Speedlites it works sometimes. I can't figure out the pattern.
Note that the flashes all work OK when actually taking a shot or using the modelling light. All flash kit works fine on my EOS 50D and 7D bodies.