don't see how to give you backend access in the forums so here you go.
Thanks for getting back to us, I already checked in your site, it seems like you already set display "image placeholder" to yes for each categories from your backend, you can check my attached screenshot below.
I already help you disabled that setting for all categories, it shouldn't show that image placeholder from your blog entry page, can you give it a check and see is it work fine now?
You are most welcome. Glad to hear that your issue has been resolved now.
As a gentle reminder, kindly start a new thread if you have any other issue in the future so it will be easier for us to manage your inquiry. I will lock and mark this thread as resolved.