Just a small thing I've observed with the Sony player, not a bug as such, rather more of a 'quirk'...
If you've been streaming music from Spotify, YouTube, or were using any of the apps on the homepage, and once finished simply leave the unit to go into standby mode, if you try and use it again afterwards to play a disc, the drawer tray won't open, as the unit won't respond to that command until you've hit the 'Home' button on the remote control, which cancels all previous commands.
The best thing to do, before each new session, is to 'wake up' the player, from standby mode, by pressing the 'Home' button. That way, you'll always be starting afresh, and it'll be ready to receive a new command.
Took me a while to suss what was happening, as initially I thought the player had developed a fault. Just thought I'd let folks know,
existing or future users (perhaps Phil), in case they encounter that issue and also think it's a fault
Marco.