Character animation transition is not smooth and character shaking

hello everyone, i am kind of new to the community and to the ue4… However, i was making a blueprint of head movement, after playing it on the field it kind of keep shaking when it rotates…i think it’s the camera making the rotation much shakier…
on the other hand there is another issue which is why i am posting to the animation sector, which is there is smooth transition between two animation, such as from idle to walk and when it gets back from walk to idle there is no smooth transition… how can i resolve these two problem, i am kind of stuck …
video link: camera shake issue in ue4 - YouTube
problem is shown in the video …
thanks for your precious time :smiley: