Since the latest update on the PS4 edition (1.31) there has been a slight anomaly with the HUD. I usually set the HUD to maximum transparency so that it only shows up when I press R1 or L1 to cycle held item and disappears a few seconds later. However, after the update, the experience level number doesn't fade along with the rest of the HUD.
Steps to Reproduce:
1. Press Options button > Help & Options > Settings > User Interface
2. Set "Interface Opacity" to "0%"
3. Press Circle (O) button four (4) times to exit.
4. Green experience number (e.g. 22) will remain visible.