Images Blurry / Fuzzy

I have the same problem. Some posts when shared to Twitter show badly blurred images.
https://www.broadsheet.ie/2018/07/06/its-a-free-read-when-youve-already-paid/ for example.

But when I submit the same post to Twitters validator https://cards-dev.twitter.com/validator it looks just fine.

I think this problem was introduced with version 9.4. At least, I’ve only started to receive complaints since updating to that version.

hi, please try regenerate thumbnails, in fact before 9.4 image sizes where not correctly added to WP so the full image used to be grabbed all the time

hi, the quality issues is happening for newly added images/post as well. Should we be adding images to WP a certain way in order for sharper images to show on twitter cards?

Hi, I installed Regenerate Thumbnails and am still having the issue. What do I need to do to fix?