Image placholder not showing in preview or when published (Bug)

Is it a bug or e feature.

Using axure for a long time now i came across this problem. Placing an image widget in to my canvas works just fine. But in preview or when published the image placeholder is not displayed. It seems like it is transparent.

What i found out is, that when applying a border the placeholder image is displayed. find a file attached with the problem.

This does not happen every time, but in some RP files it is happening in others it is not. When copying the image widget from one file (where it is not working) to another file it is still not working. ErrorImage.rp (46.0 KB)
thanks for help