UPDATE (12/2/17): I have re-tested AirRemote TTL-S with a7R III release fw 1.00 with Profoto B1 and D2 and incompatibility with Air Remote fw A3 has been resolved. Profoto Air Remote TTL-S now sync up to 1/8000 with both A2 & A3 firmware.
Warning to Sony Camera Users! Do NOT upgrade Profoto Air Remote TTL-S to Firmware version A3!
I’ve discovered that Air Remote TTL-S firmware A3 will disable HSS when using a7R III with Profoto B1, B2 and D2 flashes. Previous firmware A1 and A2 do not have this issue. (You can check the Firmware version of your Air Remote TTL-S by holding down the Mode button for 10 seconds.)
Profoto has been alerted to this issue. Hopefully it can be fixed quickly with a new update for Air Remote TTL-S before Sony a7R III begins shipping on November 30th