I already gave up of using my iPhone as Internet connection by Bluetooth PAN because if I close the Macbook, or it sleeps, after re-opening the connection is gone, and will not come back. But I have a good mouse: Microsoft sculpt touch mouse. It lost too, I have to pick a wired mouse or restart the Macbook.
This mouse already has the random lost of connection when Macbook is awake but it always reconnect (I am aware this is a common problem with bluetooth mouses, at list with El Capitan). As the PAN connection, bluetooth is lost almost every time I close the Macbook or after sleeping. Sometimes, the mouse come back after a while (minutes later) - mysterious!
I have researched around the web about, there was a solution for Yosemite by command line to restart the service, but won't work on Capitan. I could kill the Bluetooth but could not restart it.
I found a complex solution that needs home-brew and blue tools installation, will monitor the wake up and restart the bluetooth service automatically (If I understood right). But is not an end user solution, imo.
Is there any simpler solution?
EDIT: Sometimes the mouse is back when Mac sleep and awake again. One thing was working: move the mouse to wake it BEFORE opening the Macbook. Always worked. I did reset all Bluetooth and delete the .plist file - observing the behavior...