At least a couple of users on Reddit reported their devices becoming inoperable after enabling or using this feature. The problem seems more than that, though, as it is not limited to Private Space users.

From the sounds of things it’s not actually the Android 15 update that’s causing the problems; it’s actually setting up the Private Space feature. At least three users have come across the same issue and posted about their experiences on Reddit. Two of those users had a Pixel 6, while a third had a Pixel 6 Pro.