If you're using Bluetooth to connect directly from the keyboard to the PS4, it might seem more convenient than using one of the (only) two available USB outlets... but that's where I had so many problems, and they went away after going to a wireless USB. Someone had said the effective operating range was a lot shorter when pairing a Bluetooth keyboard and the system directly, leading to info not being sent/received... and based on the results I had before/after the switch, I'd say they were onto something.