I see a strange bars and tones appear in ONLY several frames of my render (like glitches).
The footage is come from AI but I think the footage is normal, because when I preview RAM it looks all okay.
And it only shows on several frames on rendered file, the rest is perfectly okay.
What is the problem?
Turn off MP rendering.
Mylenium may be on to something. Try turning off Render Multiple Frames Simultaneously multiprocessing. It may be that the multiple background instances of After Effects are having a hard time loading the footage at the same time.
If that doesn't help, then we're going to need to know a lot more if we're going to help you. Please provide answers to the questions listed here: "FAQ: What information should I provide when asking a question on this forum?"