I've been harvesting tomatoes for a while and I've noticed on one plant I've gotten some with these white spots on them. Not a bunch, maby 4 off this plant. I have cut into one before and it was brown and appeared to be rotted where the white spot was. Here's a pick of one, the skin feels rougher over this white spot. Anyways just wondering what might cause this. I have 3 other plants that are the same and no problems.