Ditex 2612 a bit strange behavior on 2s direct....

Good day everybody!
First I need too say the best servo ever!
First I should introduce how I use servo in my case...
Please take a look this video too have better picture....
youtu.be/FuOdaMK7T58
In the case in youtube I use 4x Sanyo envelope wich means cca 5volts, everything running smoothly without problems....
But I noticed servo twitching time too time when I was power the system on 2S lipo direct, fully charged...
It is look like electical discharge statistics...
Any idea how too avoid this problem ? Any special settings in Ditex manager maybee ?
Twitch happened when servo is on stendbay not when it is running...
Any input should bee great
Thanx regards