Please follow below mentioned steps in order to resolve the issue:
Perform reset setting (Setting> General Management> Reset>Reset setting).
Run the device in safe mode and check the issue.
For further assistance, register your concern in the Samsung members app (Open Samsung members app>click on “+“icon>send feedback>Error report/ Ask Questions).
I got solution for this. just install nice catch app from galaxy store and it will show which app is getting vibrating the phone. so there is a third party app is doing that. so I uninstalled that. so problem solved.
