I've checked with my M35 which got updated this evening and remaster feature in gallery is running fine. You should update all the apps again with the Play store and check it again.
I did and there seems to be a very peculiar issue. The photos that the gallery thinks are being clicked by my phone, like something I clicked rn, gets remastered alright. but the pre update pics, they are not being seen as pics clicked by the phone and hence being dark. also every app is updated.
