Help please - I'm a pro photographer making a slideshow of 600 photo image slides (a wedding). On upload to PhotoStage slideshow about 10 random images are showing as dull washed out colours, yet are fine in Photoshop and on Windows 10 monitor. Can't see any difference in these images to the rest - same Lightroom Process etc. File sizes are all around 9-11mbs, all sRGB, same as all the rest. Most of the 10 have had Photoshop work, but not all. I cannot work out how to fix it! Any suggestions?