For some technical reasons, we had to reinstall everything from scratch but after the process, we started experiencing some issues related to theme and thumbnails.
1- The Apple Style menu seems so thick. It used to be thinner than what it seems now.
This is the screenshot I copied from Google cache...
Not it looks like this:
Even the outline is different.
The second question is about the featured images shown incorrectly.
Previously, when we define a featured image and then publish the article, we could get a 150x150 pixel thumbnail but this time we only get a resized of the featured image.
Our features images have a size of 1070 px to 250 px.
When the images were resized, we used to have a portion of the image at a size of 150x150 px.
The difference can be seen in the screenshot...
There are 4 posts you can see. The last one is one of the old ones and the other three are the new posts. You can see the difference. I have checked the Wordpress settings from WP Admin >> Settings >> Media
and all the thumbnail settings are defined there....