That shouldn’t be an issue with 2025.1.1 but possibly. How big is the total repository?
Actually I’ve just noticed. Do you have copies of all of your images in the root AND the resources folder?
Yes it looks like it. Should they only be in the root?
I’d recommend just a subfolder. I nearly got your experiment working but it looks like not all of the images were there so I’m just trying to move them from resources to images (to trigger a change). It’s taking a while so I’m not sure if it has worked yet.
Done
Amazing!! 
Thank you so much for your help!
Was the syncing problem caused by there being duplicates of the images?
It looks like you made other changes in the experiment itself, so I’ll download the updated files in case I need to make different versions of the experiment.