Featured Image -- Still Having Issues Since Update

The issue is fixed for other users by following steps properly so please do it again in the same sequence.

Disable the Jetpack photon module.

Use the custom plugin colorlib-divilab-plugin-113.zip shared in the following topic.

https://colorlibsupport.com/t/feature-image-size-looks-wrong/#post-103745

Then regenerate the thumbnails on your site using following plugin.