I'm still having this issue. It only seems to happen on Chromium-based browsers, which would also make sense as to why it was occurring on Chromebooks. I'm using raw chromium. It also started happening on the same day as everyone else; October 5th.
Hi, I'm still having the issue. As @Red203 mentioned, I'm getting four failed POST requests, with error 403. Three out of four seems referring to "widevine-license", but it's strange, since my browser can play DRM content with widevine without issues.