I have 1000 task activities for a user when i click on clock icon then its just load header of the activity section but activities of that person not loading.

API calling is also okay,

NO code changes,

No Js Error occurs,

Sometime 2 or 3 activities displayed for the seconds and disappear again.

if user has less activities then its displayed properly but 1000 activities not shoswing even i setup pager setting for 5 activities but its not working.