Reproduction steps:

1. Open user attached project "AddressablesSizeRepro_1.21.19"
2. Open Window > Asset Management > Addressables > Groups
3. In the Addressables Groups window build the AssetBundles (Build > New Build > Default Build Script)
4. Open the “{Project root folder}/Library/com.unity.addressables/aa/Windows/StandaloneWindows64” folder
5. Check the size of “testgroup_assets_all_xxxxxxxxxx.bundle” file
6. Build the AssetBundles again
7. Check the size of “testgroup_assets_all_xxxxxxxxxx.bundle” file

Expected result: AssetBundles size is around 260kb
Actual result: AssetBundles size is around 520kb

Reproduced with: 1.21.3 (2021.3.34f1), 1.21.19 (2022.3.17f1), 2.0.6 (2023.3.0b2, 2023.2.5f1)
Not reproduced with: 1.21.2 (2021.3.34f1)

Reproducible on: Windows 10
Not reproducible on: No other environment tested