Futaba 7XC random signal loss

[RS Concept]

Hello Everybody.

Me and my friends using the mentioned radio gear (3 identic 7XC radios).

Some use SFHSS some TFHSS or FASST way of modulation.
All of us noted in the last 2 months RANDOM but serious signal lost for seconds.
In most cases it's like that....
I move the steering stick to side and after a second the servo move. Then I move the stick in neutral and after a second or even later the servo moves back. If I do in the opposite side, sometimes the servo even not react.
We did everything, different servos, different receivers etc..
We frankly thing, the RF module of the transmitters has same serious problem...

Anybody noted on Futabas similar issue?

Many thanks.

BR

Peter