scrollDown makes the scrollTop to 0 and calls scrollUp

Hello, im using angular 12 and ngx-infinite scroll version 13.0.0 as there is no 12.0.0, 

i am calling an API on scrollDown and Up so once scrollDown is triggerd and in the waiting time if i go to the end of the scroll it sets scroll top 0 thereby calling scrollUP

i have another div at the end of the ls which is a loader which will appear while the API is running