I have a Fuji X-T2, V6 II (1.002 firmware), and RS-60X (103 firmware). I just updated to 1.002. Previously with 1.001 the TTL mode did not show up in the camera menu. It only showed "M". The flash worked fine.
When I updated to 1.002, the TTL mode showed in the camera menu. Great! But when I shoot a picture, the flash keeps flashing until I turn it off.
When I updated the firmware it seems that it wiped out my configuration on the V6 II, so I re-entered the radio ID. Prior to that the flash didn't flash. After, that's when I saw the multiple flashes (BTW, Multiflash is off). I thought maybe I needed to make the V6 II relearn the camera, so I did that. No change.
Also previously when the system was in manual mode, turning the dial changed the power on the flash. In TTL mode it doesn't change anything. Is the power change possible in TTL mode?