audio out of control

I am having issues with my volume getting out of control randomly and turning the volume up to maximum.  I mean like about to blow the speakers.  I have to shut down the system when this happens.  I have repeatedly rebooted the streaming device and disconnected and reconnected the remote.  I have a Pioneer SC-91 receiver and a recent vintage Sony Bravia TV.  the ATT streaming device is connected to the Pioneer SC-91 AV receiver with an HDMI cable.  The SC-91 is connected to the TV with HDMI.  I have three of my TV each controlled by a separate ATT steaming device.  I am using HDMI CEC.  It will work fine for a few days and then when trying to change the volume it takes off with a mind of its own and increases the volume until I shut it down.  Any help would be appreciated.  When it works it is great and I'm otherwise very happy.  Note, I thought it might have something to do with having three TV with the ATT streaming device so I disabled them  by taking out the remote batteries and unplugging their streaming device.  I thought there might be Bluetooth confusion.  That did not make any difference.