Since updating to 1.11.2 GetDownloadSizeAsync returns always full size, that is all assets needs to be downloaded every time. I can see that when DownloadDependenciesAsync is running after that check that there is nothing it is downloading, since all assets are up to date already. So it seems that only GetDownloadSizeAsync got broken with 1.11.2 update.
I am using unity version 2019.4.3f1 and testing this in build on android.
PS.
Before update it was working fine, if assets were downloaded and not changed it was returning 0, otherwise it was returning required download size.
Just to let you know that I have downgraded back to 1.10.0 and GetDownloadSizeAsync works fine. So it is verified here that something is wrong with GetDownloadSizeAsync in 1.11.2.
I’ve also run into this issue and have had to downgrade my project to Addressables 1.10.0 to fix the issue.
@Ghetaldus have you filed a bug report for this? Doing so will help ensure the folks at Unity are aware of the issue and will get it fixed in an upcoming release.