I see the thumbnail attachment copied from 1409 on the parent post to 1386 on the child post.
2016-07-29 00:23:55 ThreeWP_Broadcast: Custom fields: Post has a thumbnail (featured image): 1409
2016-07-29 00:24:14 ThreeWP_Broadcast: Handling post thumbnail for post 1364. Thumbnail ID is now 1386
So I see nothing wrong here.
Is attachment 1386 on the child blog the correct image?
the attachment is blank. see screenshot: http://imgur.com/a/6CJIM
2016-07-29 00:24:00 ThreeWP_Broadcast: Copy attachment: File sizes again: /home/marhgilssd/aimglobalteam.com/wp-content/uploads/sites/3/2016/07/diabetes.jpg 216225 ; /home/marhgilssd/aimglobalteam.com/wp-content/uploads/sites/4/2016/07/diabetes.jpg 216225
The file should exist on disk for both blogs.
Perhaps one of the many, many plugins you have active is a problem? Perhaps WP Smush, 2.4.3?
My suggestion is to start disbling plugins, one at a time, to see if any of them is causing a conflict. According to the debug dump, the image exists and was correctly copied.
the files are there. finally figured out the offending plugin: Post Type Switcher. i’ll mark this as resolved already.
thank you for your prompt reply!
I just updated the incompatible plugin list in the FAQ.
Will upload the change on the next version.