The only thing I can suggest that might be worth trying is to add a few drops of polyvinyl alcohol to about 125-150% of your normal sensitizer volume before coating. It is a sizing agent, and will keep the stuff on the surface of the paper longer, while the increased volume may help the print anemia. I would let it dry to a matte finish (about 2 minutes) and then finish drying with a hair dryer.
Try that and see if it helps at all. This is just a guess. B&S has polyvinyl alcohol in case you don't have any on hand. BTW, does your print float or sink in the washing tray? My rule of thumb is that PVA and forced air drying is needed on paper that sinks. Not always the case, but a good hint anyway.