It 's Off.. and it doesn't only happen in taking off, landing, also occurred during cruise... I can hardly level fly....
I have made a short clip showing this.. In this video, the wind is "0", AP/Trim On. AP/YD on, however, as you can see in this video, it was swinging right and left.
Sometimes, it's even much worse...
2018-10-29 18-04-41 (1).mp4