Looping not working for .mov inserted using InDesign in interactive pdf, viewed in Acrobat
Hi,
I have followed the instructions in this Adobe article: https://www.adobe.com/au/acrobat/roc/blog/how-to-add-gifs-to-pdf.html. I have inserted a .mov file into the InDesign file, and have selected the "Play in loop" option in the media controls. I have also selected the "Play on page load" option.

I then export as an Interactive PDF, and open in Acrobat (fresh install today). The file plays on page load only after giving the file permission.
The problem: The file does not play in a loop, it plays once and defaults back to the poster frame. There are also no controls that allow it to be restarted.
I believe I have followed only steps specified by Adobe, so I don't understand why this isn't working as expected. Any suggestions?
(I am on a Mac, if relevant)
