My Remote Partner Sound Returned After Several Days Gone

After several days not working my audio problem with the partner remote computer suddenly returned and has been fine for now several days.  No updates to my TV or the partner's TV, and both using 12.0.78716 May 31, 2017 16:04:33.  Both computers Windows 10 Home.  My version is 1703 Bulld 15063.413   Partner computer has Windows 10 Home version 1607 Build 14393.1358.  Volume sometimes has to be increased to hear it, however it is audible consistently now.