Description

These Stories don't get marked as loaded even when they are, until it timeouts after a few seconds. This leads to extremely slow loads on Players relying on Story load events before displaying the content.

cc @ampproject/wg-stories

Reproduction Steps

Examples:

• https://www.google.com/amp/story/s/www.topspeed.com/stories/cars/hennessey/2021-ford-mustang-shelby-gt500-by-hennessey-performance-ar191807.amp.html
• https://www.topspeed.com/stories/cars/car-news/is-the-lexus-rc-f-track-edition-any-better-than-the-mustang-mach-1-ar191796.amp.html

Relevant Logs

No response

Browser(s) Affected

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OS(s) Affected

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Device(s) Affected

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AMP Version Affected

No response