Object 'jitter' or 'jumpiness' in Unity AR with Vuforia,How to control object 'jitter' or 'jumpiness' in AR unity with Vuforia.

Hi All, I am using Unity 2019.3 with Vuforia 8.3. I created AR app, when target image appear object showing but object 'jitter' or 'jumpiness' happening. i am not able to control.,Hi All, I build AR app using unity with Vuforia, if target found the object shows but the 'jitter' or 'jumpiness' happening. I am not able to control.