Spirit GT with Geolink, Pitch stops but Roll and Nick work

[heli_tom]

Hi there,
I have a problem with my T-Rex 550L with a new Spirit GT pus Geolink.
After a first short sightseeing flight (1350 RPM) I increased this to approx. 1700 RPM and when hovering briefly, the pitch stopped. The cyclic control works for both aileron and nick but not pitch. The swashplate twitches up and down slightly and only calms down after switching it off and on again. I could only land with cut off the engine. On a second try, the same game. In the situation on the ground, I switched stabilization on and off as well as maintaining the position and height, nothing changes anything. Does anyone know the problem and have a tip?
I use a Graupner GR16 receiver connected to Spirit GT via SUMD, Transmitter MZ-18/24 Pro.
Thanks and best regards Thomas

[ZeXx86]

Hello,

it seems that you enabled Altitude Hold function. Please disable it by assigned switch or in the Spirit Settings.
Then all should work well.

[heli_tom]

This could not be the reason, because I have already allocated a Switch and Switched IT to both position without effect.
Max IT be the temperature? I have had round about 2°C