Is it possible to deactivate your plugins for a moment, and check again? Because I found the HTML source code is incorrect, also, there are many javascript errors when I checking the blog page with chrome developer tool > console. Looks like the issue is caused by a plugin, but I’m not quite sure.
Actually, you can do it by yourself, just deactivate all your plugins, then check the blog page, if the blog posts will display as normal, please let me know, then we can schedule a specific time that I will try to deactivate the plugins one by one to find the question plugin.