After creating mosaic dataset, rasters are added to it and footprints are edited because every raster has the white frame that has to be removed in order to get mosaic image. After editing footprints RGB rasters turn out to be black and white. Rasters and mosaic dataset do not have statistics calculated, color balancing is not applied.
Same workflow is replicated in ArcMap 10.3 and after editing footprints rasters remain in their original state (RGB) except they are clipped to new footprint.
All raster are in .tiff format.
Footprints editing is done both manually in Edit session and using GP tool Import mosaic dataset geometry. Result is the same. After clipping raster to new footprint, raster change it properties and turn out black and white.
Please, refer to attached images Mosaic 1 through Mosaic 4.
Also, after sharing mosaic as image service same thing occured. Mosaic is created in 10.3 and published through 10.3 client to ArcGIS Server 10.5.1 and then opened in both ArcMap 10.3 and 10.5.1 and result is black and white rasters.