So, I have a Canon 580 EX II and a YNE-3 RX remote trigger that I control with a YN-E3-RT transmitter.
According to what I read this should work. The transmitter has the flash icon for HSS enabled, the 580 has it as well enabled and is set to manual.
However, as soon as I go over 1/200 I see the shutter in the image... The transmitter and the receivers are updated to the latest firmware, I just did this a moment ago and tried it.
Is there any way of getting this damn flash to work with the transmitter and receiver? :(