Facebook scrolling and chirping sound issue

While scrolling on Facebook .. its not going smoothly when scrolling and there is a "newsfeed sound" .. but iam just scrolling not refreshing the app .. its weird thing because its was okay in the morning but in evening this problem happened. Also the scrolling on Facebook is not butter smooth anymore as it was.

Has anyone found the fix for the issue? Turning in app sound is not fixing the issue it’s just turning off all in app sounds.