Reproduction steps:

1. Open the attached project “WebGL_Addressable_Test copy.zip“
2. Go to File → Build Profiles, select “Web” platform
3. Build the project by clicking on “Build” button
4. Load the built project using local web server
5. Open the web page of the built project in the browser
6. Open the Inspection mode of the browser
7. Navigate to Inspector’s Console tab
8. In the WebGL Player, click on the “Button“ button (note that in the Inspector’s Console tab the download size is 139134)
9. Refresh the page
10. Click on the “Button“ button again
11. Notice in the Inspector’s Console tab, that the download size is the same

Expected result: After the second download, the size is 0, as it is cached by the browser
Actual result: The downloaded file is cached, but the size of the file is still greater than zero

Reproducible in: 2022.3.49f1, 6000.0.22f1
Could not test with: 2021.3.44f1 (Unfixable errors when building the Player)

Reproducible on: MacOS 14.6.1 (M1 Pro), Windows 10

Notes:

* Tested with: Google Chrome (Version 129.0.6668.70), Firefox (Version 131.0) Safari (Version 17.6)
* Make sure to “Build” and not “Build & Run“ as it disables caching