Database Images not Displaying Anymore (shortly after deployment to Forge)

Not sure it's necessarily because of the Forge-Envoyer deployment, but some time after I successfully upload a picture and it displays correctly, it's suddenly unavailable after a day or two.

I suspect the name in the database (generated by the time() function) changes so it can't find the initial image name.

I also use "Imagine" for resizing but I don't think this affects it in anyway.

What could likely be wrong?