Featured image not appearing in the post

Hi,

I’ve been ironing out some issues with the featured image in my blog posts. After some research, I found that there were some changes made by WordPress in Oct that might have an affect on this. I tried some options suggested in the forum (changing the image size/re-uploading the scaled image, etc) with no luck.

Here’s the link to the post I’m trying to fix: https://consultpacific.com/creating-process-maps/

This is an older post that works fine: https://consultpacific.com/process-definition/

I’m using Vulcan Minimalist theme. Can someone tell me how to fix this issue? My previous posts are all fine. They display the featured image perfectly. I wonder what’s wrong…Thanks in advance for your inputs and suggestions.