I've got 3 X Canon 580 EX IIs. They all seem to work fine on my camera hotshoe. When I attach each one to the hotshoe, it does not fire during the attachment process. It then all works as expected when pressign the shutter button.
However, I also have 3x Godox X1R-C wireless recivers and a X1T-C transmitter.
with 2 of the X1R-Cs, when I attach any of the flashes, the flash triggers without me touching the test of pilot button. This happens everytime without fail. Once attached, then everytime I press the 'TEST' button it will never fire the flash. It seems to fire maybe 2mm before being fully into position.
However on 1 of the X1R-Cs, this does not happen. When attaching it doesn't fire, and then the test button works as expected. Even more confusing is if I turn off each of the X1-R-Cs and remove the batteries, 2 of them fire the flash when attaching, but one does not.
The reason I'm asking is that those 2 X1-Rcs do not work in manual mode, only TTL and I expect it's related to this issue.
As a side not, attaching each flash to the X1T-C does not trigger the flashes on attach, and the test button works.