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Upload button in form WITHIN CMS collection not working

I have an upload button in a form in a cms collection.
This is because users on my site can submit forms to particular CMS items.
When a user however, tries to edit anything but the first CMS item the image they are trying to upload using the upload button appears in the first form rather than in the second or third form they might be trying to use.
I suspect this is something to do with repeating the upload button and webflow not realising they are different buttons in different forms within a CMS collection.

Does anyone have a solution?

Here is my public share link: