Loss of control in CAS, cursor disappears.

@midtwilightblue There are some reported issues with controls in the CAS, but yours sounds different. Can you please try the following troubleshooting steps.

Try plugging your controller in to the PS4 using a cable, see if the connection issue persists.

DS4 Troubleshooting full guide here. C/P of a small section below.

To reset your controller follow the steps below:

1. Turn off your PS4 and unplug it from the power source.  

2. Unplug your router or modem from the power source. Sometimes connecting issues are caused by internet router WIFI signals, unplugging it will help troubleshoot the connection issue. Locate the small reset button on the back of the DUALSHOCK, located near the L2 button. 

3. Use a small, unfolded paper clip or something similar to push the button inside the tiny hole. Hold the button down for roughly 3-5 seconds and release.  

4. Then, re-connect your DUALSHOCK 4 (micro USB port located on the back) to your PS4 (USB port located on the front), using the USB cable that came with your PS4.

5. Plug your PS4 into a power source. Don't plug your internet router in at this time. Press the PS button on DUALSHOCK 4 controller and then log into your profile. 

When WIFI router is off and the light bar on the controller is blue

The issue is likely with your internet router and you need to contact your Internet Service Provider, or if you purchased your own router, contact the product manufacturer and make a request to change the broadcast channel.
 

When WIFI router is off and the light bar on the controller is white

This means your controller is not connecting to your PS4. If the troubleshooting above didn't work and your DUALSHOCK 4 is with the one-year warranty period, you can send your DUALSHOCK 4 in for service. Visit the Fix & Replace page for more information.