[Bug] Videos on "popular" page don't have a length

[SamantazFox]

Describe the bug
On the popular feed, the video length (bottom right of the thumbnail) doesn't show up.
This is quite random and doesn't apply to all videos.

Steps to Reproduce

1. Go to any instance
2. Click on "Popular" (https://redirect.invidious.io/feed/popular)
3. Randomly see problem

Screenshots

Additional context

• Reported by normal_user over on IRC
• Affects all browsers tested

[zero-thermo]

I also recently noticed a similar problem after upgrading my Invidious docker container.

Time video length still shows up in Trending, but not in Popular or Subscriptions. All videos in my Popular and Subscriptions categories are missing video lengths.

[RadoslavL]

From what I could see, it seems to only happen for shorts and livestreams.