Topic thumbnails broken when topic includes uploaded video

I updated to the most recent version last week and noticed a change in topic thumbnails behavior: as soon as a topic includes uploaded video (an uploaded mp4 file, for example), the topic thumbnail blanks out - even when the topic contains images that are posted above the video, or when one image is marked as |thumbnail.

Here’s an example:

And here’s how it renders in this user’s portfolio:

Edit: fixed portfolio link


Thank you for reporting this! I’ll take a look and see what I can figure out.


Were you able to reproduce it?

I can reproduce the “blank” thumbnail image, but only on mobile so far. For some reason it is generating a blank image from the canvas element used to grab the first frame of the video.

Let me see if I can come up with way to fix it manually for now, until I can come up with a proper code fix to address the issue going forward.

1 Like

@bartv this PR should fix your current issue with that post. After you update your site if you rebake that post (clicking the Rebuild HTML button) it should switch to using the first image as the topic preview. I’m currently working on another PR to address the blank video thumbnail issue that sometimes occurs.


That fixed it, thanks!