[Bug]: Post Thumbnails are not generated anymore, after upgrading to v0.19.6 & v0.19.7

[r-hmn]

Requirements

• This is a bug report, and if not, please post to https://lemmy.ml/c/lemmy_support instead.
• Please check to see if this issue already exists.
• It's a single bug. Do not report multiple bugs in one issue.
• It's a frontend issue, not a backend issue; Otherwise please create an issue on the backend repo instead.

Summary

The post-miniature (for e.g. links to youtube video's) is not showing for new posts.
(i tried pasting a picture by clipboard into a post body, and that pictrs-entry did get properly inserted, and using that url as thumbnail url does work)

Steps to Reproduce

1. login as bot or non-bot user
2. go to a community, and 'create post'
3. fill in a link (i tried both a youtube link, and a mainstream news-website link)
4. both the post detail-page and that in the community page show this 'link arrow' instead of a thumbnail

Technical Details

The previous version before upgrading was v0.19.5

My system is setup using ansible;

docker ps
CONTAINER ID   IMAGE                                   COMMAND                  CREATED        STATUS                 
992929be834f   nginx                                   "/docker-entrypoint.…"   6 hours ago    Up 6 hours             
68f555619c4d   dessalines/lemmy-ui:0.19.6              "docker-entrypoint.s…"   6 hours ago    Up 6 hours (healthy)   
9622dd15ff8f   dessalines/lemmy:0.19.6                 "lemmy_server"           6 hours ago    Up 6 hours             
905faa39f108   pgautoupgrade/pgautoupgrade:16-alpine   "/usr/local/bin/dock…"   6 hours ago    Up 6 hours (healthy)   
e3560dd39a8e   portainer/portainer-ce:latest           "/portainer"             4 months ago   Up 6 hours             
40e95d9fa263   mwader/postfix-relay                    "/root/run"              4 months ago   Up 6 hours             
3cea99868998   asonix/pictrs:0.5                       "/sbin/tini -- /usr/…"   4 months ago   Up 6 hours             

uname -a
Linux ly-lubuntu 5.15.0-125-generic #135-Ubuntu SMP Fri Sep 27 13:53:58 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

Lemmy Instance Version

0.19.6

Lemmy Instance URL

https://lemmy.staphup.nl/

[Nothing4You]

this isn't a ui issue, there are thumbnails missing for various posts to external urls on lemmy.ml as well: https://lemmy.ml/?dataType=Post&listingType=Local&sort=New

the api response for those posts does not contain a thumbnail url.

[r-hmn]

Thanks
i actually started an issue on the other repo, but stopped and started again here. Assuming it was a frontend thing🤷‍♂️
i read an issue could be 'transfered' to another repo. But i don't see the option. i probably don't have permission to.
Can someone else move it there?

[r-hmn]

i upgraded to v0.19.7, but this problem is still there.

[dessalines]

Most likely related to this, where mainstream sites are inserting a ton of javascript before their opengraph tags. We'd need specific websites tho to test, and this wouldn't be a front-end-issue.