I just wanted to check-in and see if there’s any news regarding this. Today, I tried again with a fresh install of WP4 and used only Advanced Custom Fields and the Repeater Field Add-on to attempt to add multiple images using an iPad and/or iPhone.
I also tried adding the code above to the input.js and separately as a another JS file with no success. A single image button outside of the Repeater Fields seems to work as expected.
If there’s other code to add in order to get it to work, I would greatly appreciate it.