TYPO3 Core

If using TYPO3 in Frontend with config.contentObjectExceptionHandler=0 and a CDN in front, then TYPO3 just shows the page with an error message and the error code, and thus, replaces the plugin rendering, but it sends a HTTP Response with status code 200, and the configured headers.

If you use a CDN, and use manual cache purge / flush logic, it might happen that a page (let's say with a career job offering listing) with this error is cached in the CDN for multiple hours or even days, because of a broken state when the cache was empty the last time.

Instead, a 50x response should be sent if ContentObjectRenderer catches any exception, to ensure that TYPO3 Frontend never sends such information as cached response.