"Careful Guardians, with time being torn to pieces, the Past and Future may get a little... Weird." And as he suspected, when the Titan entered the portal, all of the landscape was literally being destroyed as if by an invisible explosion. As the debris went outwards, it stopped in mid-air before rearranging itself back to where the detonation happened, as if the 'detonation' never happened, then being torn up again and placed back over and over.