Had this now a couple of times - during TV without doing anything playback suddenly tops and the timshiftbuffer starts to play the recorded program from teh start of the buffer instead of the running program. Manually stopping and starting playback get's you out of this. As this is not hapening on a regulkar base collecting datat is rather difficult - but here are all teh logs - must have been around 22:00. Hopefully an issue can be identified