Youtube supscription page empty bug?

Troubleshooting already tried:

• Cleared browser cache and cookies
• Logged out and back in
• Disabled all extensions
• Tested multiple browsers
• Tested on another PC and on my phone
• Tested both Wi-Fi and LTE
• Changed DNS servers

The issue persists on every device and every browser, so it doesn't appear to be client-specific.
Only used the website version of youtube (no app).

One interesting observation:

When I zoom the page in and out, the subscriptions occasionally appear for a short time. Sometimes opening the browser DevTools and then zooming also temporarily makes the videos load. Most of the time, however, only the placeholders remain.

From what I can tell in the Network tab, it looks like the request responsible for loading the subscription videos sometimes returns an empty result, even though there should be plenty of videos. The console mostly shows sandbox warnings and some ERR_BLOCKED_BY_CLIENT requests, but nothing that clearly explains why the subscription feed itself is empty.

Anybody else got this Problem?