Issues with spectator mode after death in Hardcore mode

如影片所見，這是在預覽1.21.0.20以前創建的世界，這個世界是極限模式，然而已經死了，但今天重新進入的時候，無法像旁觀者模式一樣起飛。
※以上為機器翻譯，如有不準確的地方請見諒。

As you can see in the video, this is a world created before preview 1.21.0.20. This world is in Hardcore mode, but it is dead. However, when I re-entered it today, it could not take off like the spectator mode.
※The above is machine translation, please forgive me if there are any inaccuracies.