The past few days - perhaps last week or two, not really certain when I first noticed - I have noticed certain words are simply not appearing in stories. They're not even being masked. They're just not there, leaving an empty space or two from the surrounding spaces. I can figure a fair number our from context, but not all, and it's a distraction to have to figure out what it is I'm trying to read as opposed to just enjoying the story. I've confirmed it happens in multiple stories. I can also confirmed I've had no software installations in that time. I suspect it relates to the filtering of categories and tags mentioned recently, but I'm in no position to be able to test.
Edit: I just read some earlier posts here that answers this question: the words are filtered out, and we have to be logged into accounts that are at least a month old to see them.