Possible conflict with Woocommerce Product Add-Ons plugin

I have a website that utilises the Woocommerce Product Add-Ons (PAO) plugin to attach uploaded files to the product order. This has worked fine until I added the Ajax Add-to-cart plugin to the site. Now, even though files seem to upload correctly (there’s no error), when viewing the order in the WC backend only the path to the file is shown. It’s no longer a link to the file, just a URL. This is also the case when the file is listed on the cart page, and in the order email. To make matters worse, its starts with “C:\fakepath\” (on a PC) which seems untrustworthy.

I’ve tested the store using the Storefront theme, and with only the Woocommerce, PAO and Ajax Add-to-cart plugins active.

I’ve now deactivated the Ajax Add-to-cart plugin (it’s function is less important than PAO), but I’d like it to be reactivated at some point.

Can you help at all?