When using the Keypad, some buttons flash yellow LED blinks and others flash white.

-This is most common for the track forward button when using streaming radio services that do not have a track forward function.  

-If this happens with the play pause button:  the paired Sonos device may be a group participant.  If this is the case and you are running firmware v1.2.0.45 or earlier on your keypad (to check firmware version, enter the iPort Connect App, tap on the device in the device list and you can view the firmware version number on the device dashboard page), the keypad will pause function until the group is dissolved. This will be resolved in the next major firmware update. 

-If this happens with the favorite button:  there are some Sonos favorites that are currently not supported under the UPnP implementation of Favorites: Sonos Playlists, some locally stored tracks and albums.  This will be resolved in the next major firmware update with the adoption of the official Sonos Favorites API.

-If this is happening with all buttons consistently, re-configure keypad to network by pressing and holding volume up and down for 6 seconds and using the configuration process in the iOS App.  It's possible that your network credentials or topology changed and we need to get updated information to the keypad.