Reproduction steps:
1. Open the user's attached project ("ABTest.zip")
2. Open the repro scene ("SampleScene")
3. Build Content
4. Enter Play Mode
5. Inspect the DownloadSize in Console logs
6. Exit and re-enter Play Mode
7. Inspect Console logs again

Expected result: DownloadSize is 0 as bundles were cached
Actual result: DownloadSize returns the actual size of the bundles (3161199)

Reproducible with: 2018.4.25f1, 2019.4.4f1, 2020.1.0b16, 2020.2.0a18
Reproducible with package version: 1.11.2
Not reproducible with package version: 1.1.10, 1.10.0

Notes:
1. Bundles are still being cached locally, but their names differ from cached bundles from 1.10.0 and below
2. The issue does not reproduce when the cache contains cached bundles from 1.10.0 and below.