September 9, 2019 10:20 PM
The issue that you're facing may be due to one of the two reasons:
- The image you've uploaded must have a size less than the defined size.
- You've not regenerated thumbnails once you've switched the theme.
We've defined two image sizes, 800x450, and 450x450 in our theme. The image size, 800x450, is applied for featured images displayed in the home page, category page, and search page. The image size 450x450 is used for image in related posts section in post detail page. When you upload image in WordPress dashboard, it will automatically be cropped into the defined sizes. Make sure, you upload the image with size at least 800x450 or greater.
If you've switched into our theme, regenerate thumbnails using Regenerate Thumbnails, plugin.
I hope this will help you. If it does not, we'll be waiting for your response.