Usually net upgrade size is around +20Mb, but sometimes it is negative.
However the recent update:
Net Upgrade Size: 962,19 MiB
Is bloatware being added or what?
BTW, it is the same recent update that had problems with pinta packages. I waited for a fix, but there wasn’t any, so finally decided to install it by removing pinta first.
Everybody gets different updates based on what packages you have installed.
You need to share the full output from pacman for us to give you meaningful information.
We don’t add things to your existing installation.
Maybe some packages have new dependencies and they are being installed. One of my recent updates pulled JDK 21 and the net upgrade was 1.2 GB .