There are a few possible causes for this problem. One is that the PlayStation 4 has a defect in its disc drive. If it does, it can’t read or write discs properly. This can cause the PlayStation 4 to eject them by itself, as well as create problems with game play. Another possibility is that the PlayStation 4 is having trouble recognizing certain discs. If this is the case, it can’t find them and will eject them by themselves. Finally, there could be some other reason why discs are being ejected by themselves on Playstation 4. It’s worth checking to see if this problem is happening to you and if there are any solutions available.