So, all of a sudden my Futaba Transmitter won't link its throttle with my RX8 unless I reverse the throttle on the transmitter. Just started today.

Before when I calibrated transmitter to ESC, it operated normally, set neutral point, pull back for throttle, push forward for brake. Calibration complete.

Now I must reverse throttle on transmitter for correct function

Futabas generally need to have the throttle channel set to reverse (FlySky's too). That is odd that it worked normally before but we have seen that before.