I have my 55PFL8007K/12 since two weeks.
I have installed the latest soft update.

From time to time, when watching tv, and without apparent reason, sounds gets delayed versus the image (a delay of 30, maybe 60seconds). I happened also before the sofware-update. To get rid of it, I have to change channel and come back.
What is at the origin of this phenomena ? What can be done ?