Flattening layers results in the image turning black.
Since the last update to Photoshop cc (2019), I have been plagued with an issue of the image turning completely black when I flatten the layers, this only occurs after using any of the options under "Lighting Effects" (Filter>Render>Lighting Effects). Saving the image without flattening and then passing it back to LR results in the same thing, i.e. a completely black image.
Can anyone offer any insight into why this would be happening?
