According to psychmnts, a Reddit user, games are automatically being deleted or “disappearing” from some PlayStation 4 systems.
“This morning Killzone was missing from my system after only playing it 2 days ago and seeing it on my system last night while playing Outlast. After initializing the console last month I thought it had fixed the issue but it seems not. There are no error messages or anything to suggest there is a problem with the console.”
Apparently, this has been happening for a few weeks, since several users have reported the same issue in the past. It seems that, at least, save files are safe and they are not being deleted due to this bug.
Have you experienced any problem with your PS4?
Source | GamingBolt