P1 Stick Switch fail when temperature is high

I have a DC16II TX Carbon Red that is working flawlessly for two years, but this summer I had a problem with the right stick P1 switch. It happen me two times, with ambiental temperature over 32º and after 2-3 minutes under the sun, the right stick P1 switch, didn´t work when push the right, but it works to the left. Stick P1 Switch is set to 85% both sides. When checking after landing, not more under sun, in the screen it shows that switch works to the left side but not to the right side. If change model memory it just work first time and then fail. If wait 2-3 minutes then it works 2-3 times and fail again. If wait more time not under sun, it works Ok, but I didn´t try to fly more just after fail, as not confident.
I have news from other Spainsh F3A pilot that had the same problem, I checked with him and confirm that suffered the same problem with DS24 in P1 and P3 when temperatures are high, but didn´t have with his new DS24II.
It is any solution for this? It will be not nice to have this fail in a competition and receive a low score because special setting for a figure didn´t work.

Waiting for comments.

Hi Alfonso,

I guess that there is a problem within the stickswitch itself (or the respektive wiring). I would suggest to send the transmitter to the Jeti-Service for check and if necessary replacement of the stickswitch.

Regards,
Volker