Linkedin does not display article description after sharing on configured url

I don't know if anyone else has experienced another issue, but I just don't know why the article description is not showing on my channel page after sharing. I used these guidelines to set up URL sharing: https://developer.linkedin.com/docs/share-on-linkedin

i.e. my link looks like this:

https://www.linkedin.com/shareArticle?mini=true&url=http://developer.linkedin.com&title=LinkedIn%20Developer%20Network&summary=My%20favorite%20developer%20program&source=LinkedIn

If you follow this link, you will see a summary ("My Favorite Developer Program") displayed in the preview. However, this resume is not visible on my channel after the exchange. The same thing happens if I use the tag in the markup instead of specifying "summary" directly in the URL

I would be very grateful for your advice.