There seems to be a bug when exporting some files to jpg using V.1.5.2 on MacOS 10.12.5 using the Soft Light blend mode with the gradient tool. The original file was a Canon CR2 RAW file & it only seems to happen with the Soft light blend mode, see attached. I got around the problem by using the edit extension in Photos, but it persists when the edit is active in the full program. This is only a soft light problem as I tried the export with no problem using the Colour Dodge Blend Mode. See attached.