Mine does the same thing. It's not all that often, but yeah, sometimes when I turn it on it doesn't read the disk. Just last night when I went to put it in rest mode, it hung up at the "please wait" screen for a bit, then gave me the three beeps and then finally went into rest mode. Wasn't saving in the game or anything, just on the Arkham Knight main menu.
Starting to get concerned it might be a hardware thing, because it did this every now and then prior to the most recent update.
Starting to get concerned it might be a hardware thing, because it did this every now and then prior to the most recent update.