Applies to Photoshop 24.5 and 24.6 (beta)
To replicate:
- Open any PNG file, this is a single layer file.
- Convert the layer to a Smart Object
- Apply any Smart Filter
- Press CTRL+W to close the file
- Press Yes to save changes
- Photoshop will NOT show the "Save As .PSD" dialog window, but instead overwrites the original PNG file without warning, flattening the Smart Object layer and destructively applying any Smart Filters.
Issue does not occur with JPG files.