We recently pushed deployed an interface from our development environment into our preproduction environment. A part of this interface is a document upload that then uses an imageField component to render the an uploaded heat map image. The component and interface worked as expected in development but in preproduction the image fails to render. We have checked things like security even though we noticed while logged in as admins. We tested using a small-scale interface and experienced the same behavior. I'm not sure what could be the discrepancy at this point. I'll upload some screenshots for clarity.
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The last 2 screen shots - are those different environments or different documents within the same environment?
The form submits the form/document via a!fileUploadField, but then it is not available, correct? Or is this using a!submitUploadedFiles()?
Can you confirm in /design that the document ID correctly references the file you are expecting to preview? Such as: