HT011A D/R and FMD buttons

[emelin]

Thank you for your explanations.
I have the same problem with transmitter H011T and H051A. I purchase this product mid august 2018 on Amazon.fr platform.
The drone H501A works fine with WiFi and iOS App.
With the transmitter H011T on mode WiFi or 2.4 GHz, it’s not possible arming the drone.
The R value increase alone with the left joystick in the center position. The R value is not stable and change alone (0% then -xx%), then return to 0% if i touch the joystick.
When i moved the left stick to left or to right, it does not work (R value stay on 0%).
It is not possible to make calibration with the defect left stick. Left corner is not recognize.
I think this transmitter is defective. It’s not ?

Video with the problem.