My Download went down in precent

Hello i am here to see why in the world i had my PC on ALL NIGHT to download Apex just to look and find out that my download went from 50% TO 25%. Now I have to do this AGAIN which i have been trying to play Apex for so long but I hate to keep my PC on. If there is any fix and/or reason to why please let me know so I dont mess up if it was some how a problem with me.