Post and Archives Pages Showing Thumbanils for Featured Image

Hello everyone. I’m using the Twenty Twenty Four theme for my website and I noticed that the Featured Image block is displaying the 125×125 version of the featured image on the post (the F.I. is being used as a hero). I don’t see an option to force a certain size in the block’s settings panel.

It seems to be an issue with older posts only, as the more recently published ones display the appropriate size.

Looking for help in addressing this.

The page I need help with: [log in to see the link]