: Do not use the time rewind mechanic inside the Observatory room, as this heavily de-syncs the puzzle scripting.
: Ensure that your game is updated to the latest version. Game developers often release patches to fix known issues. prince of persia the forgotten sands the observatory bug fix
According to the French troubleshooting guide, "Effacer l'Autosave force alors le jeu à recharger la Backup Autosave, qui se situe généralement juste avant la scène, avec le totem prêt à apparaître comme prévu" (Deleting the Autosave forces the game to reload the Backup Autosave, which is generally located just before the scene, with the totem ready to appear as intended). : Do not use the time rewind mechanic