There is also a chance that some servo load at T.O. and landing is causing the RX voltage too droop enough to cause a glitch. First, is your receiver battery separate? Do you have a voltage regulator or BEC on it? Do you have some heavy servo load, like a flap linkage that may be binding or a steerable landing gear component?

Electric sailplanes, for example, can have very high servo loads at landing with full flaps. Such loads can cause a glitch if a BEC is used and is not correctly sized for that load.

John