That is how single coated lenses work. The effect is adaptive on scene contrast.
Use a deep lens hood and no filter contrajour you don't need flare.
I carry two sets of lenses MC and SC all great painters had more than one brush?
But I use Microphen or ID68 rather than D76 (about 1/3 of a stop) and a borax post bath rather than overdevelop, id meter HP5 at 650 for zone0. If Ansell can use Borax so can I.
When It gets too dark I overdose with latte in coffee shops with WiFi. Negs are pigs to print or s#&&, if I don't.