My Sony KD49XD8088 has recently developed a fault with the Amazon App; when attempting to play video content the display goes blank combined with stuttering audio. Most of the time stopping the play and restarting the stream sorts it and video streams work fine until I stop the app and return to it,  then the fault occurs again. Sometimes the app locks up and the only way out is to restart the tv. It only recently showed this fault and there has not been (as far as I'm aware) a software upgrade. Th TV is on the latest November 2016 firmware.

Does anyone else have this problem (or a solution)?