It is only a hypothesis, but it has attracted some notice since photographers worldwide have been capturing something completely new – hexagonally shaped lens flare. The Hexagon Hypothesis, that there is a solar simulator in place (sometimes?) would seem far fetched on its own, but many others have noticed a difference in the skies.
I’ve seen several accounts or videos attributing it to a Mandela Effect which the Hexagon Hypothesis does not necessarily exclude.
I’m not sure anyone’s put together a cogent argument for why sometimes the sun appears differently, so I put my research and investigation skills to work. It is just a hypothesis right now.