some images in the website are broken

I have noticed that some images are broken in the website when I inspect the page they are served from the old server which is turned off, I’ve tried to change all the database URLs from the old URL to the new URL and that’s working fine.
but the images after that are still broken and served from the old server “old URL”, when deactivating the plugin the images are back again.

Seems king composer plugin is cashing the images in some place. as there is no other explanation for this

awaiting your prompt feedback please