Why is my Fortnite update getting bigger?

So today came a 2.2 GB update in Fortnite and I started to download it but when I had 500mb the download stopped and there was 4 GB when I then canceled it again because I didn't want to download 4 GB there was 7 GB then I got mine pc restarted and then there was 14 gb. It is not a display bug, I really have to update 14 gb now, which takes ages for my internet
The picture was taken when it was still at 5 gb. Now it's already at 14. I've heard around and nobody else has the bug

I don't think you can do much there, except download it!

Yikes