How to fix Rock Band 4 controllers disconnecting

1. Follow the How to sync Rock Band 4 instrument controllers on PlayStation 4?
2. Reduce wireless interference:
   1. Move other wireless devices away from your play area.
   2. Keep the controller within a clear line of sight to your console.
3. Test your controller again during gameplay.

If the issue continues, your hardware may be damaged. Contact your hardware manufacturer for support or help with updating firmware.

Note: Wireless interference from nearby devices can affect controller performance, especially in crowded signal environments.