We checked the plugin code and found that the Essential grid plugin uses the filter to replace the post thumbnail https://prnt.sc/8X1GZSDKDIaK and it causes the issue because their shortcode and filters are loaded everywhere where we want to get that post as the object. Much better it would be for them to make filters only in cases the shortcode was loaded in the page/post content.
So, contact the plugin author because we can’t change that from the theme side but probably plugin author should take a look at this.
So, don’t apply essential grid instead of the post featured images in the post settings https://prnt.sc/T7Tq3BofvRwW
Or disable prev/next post navigation in theme settings.
