Hey there,
I am really sorry for the delay of this reply as it is a weekend for us here.
I tried to download you attached that zip file in earlier which contain a list of image and I did a test upload 1 shot for all the image into the gallery block, then i wait for a while until it upload into the gallery block complete (it totally send 141 request to your server to save the image, but this 141 request included other thing as well.), after that i only save the blog (for this testing i save it as draft), then it seems work fine for me, i can view all the image. you can check my attached screenshot below.
However, i have a few question :
1. Do you also upload once for all image into 1 single gallery block? Or you upload it separately like first i upload 10 image, after that upload another 10 image?
2. Do you have wait for a while after selected all the image to upload into the gallery block?
By the way, I've inspected that gallery element on the article page, it seems like for those last few image still under uploading state, this is why it doesn't populate the image on the site is because you already press the save button. You can refer on my attached last screenshot below.
Perhaps this time you try upload a list of image into gallery block again, but this time you have to make sure it did upload completely, you can click on the last second bullet icon (
http://take.ms/tLRG9) to check whether the last image did uploaded completely.
If it did show the image, mean it did uploaded completely, then you only press publish button.
If this time can work correctly, then I will report this to our developer and see whether we can do something about it, so if the image still uploading, do not allow user to press publish button from the composer.
Keep us updated then.