Topic: Activity Log: Vanishing Titles

I've noticed in my activity log lately that some titles in my Software Library have vanished, playing a blank entry from where they were.

Anyone know what gives?

I have noticed that it deletes old and unused programs to make space for new ones.

Since the book is rather limited in space I'm fine with that.

I believe the data is still there and will reappear if you play the game again, it just disappears from the book.