In the early stages, there was a good number of failures (mis-fires, full-fires, weird EXIF data). Testing and examination of the images and data showed that they may all be due to a user-interrupted Refresh transmission.
When a change is made on a Knight or a flash, there is no transmission. On 1/2-shutter, there is a steady stream for less than a second, followed by a slow blip. The evidence is that the initial stream can be interrupted and a shot taken, ready or not. The stream seems to be a complete re-send of the settings. This would explain the different stages interrupted as revealed by image and EXIF. A little user attention has removed all the misfires, and reliability since has been high. However, a delay before full-shutter may be unrealistic in some situations.