I have had two instances since July this year where the Honeycomb/hexagonal background structure appeared for maybe a second and a half before it disappeared.

One upon waking up one morning the corner of the ceiling was being laid in then it looked solid and normal. Then around 3 week's ago was listening to music on YouTube and the TV screen turned into the same for about the same amount of time.

I would like to hear of others who have seen or experienced the same or something similar.