A few times over the last couple weeks, I've had players vanish from my friends list at random, not intentionally removed on either side apparently.

For an unknown reason, the friends list is pruning itself--the weird part is that I still retain the same number (even when I have to re-add, it stays at the same total before and after the player is readded). I'm not sure how to reproduce the issue, it's been happening (seemingly) utterly at random.