When UE5 game project packaged, the level switching/save/load functions fail, and player information lost!

Hello everyone, in my UE5 game project (based on FCS), the save/load/change level functions can be used normally when I use the editor to switch levels and load archives, including transferring player information, such as props, levels, money, etc. .

However, when I packaged the game and switched levels again, the player’s information was lost.

The original blueprint is based on the slot storage mechanism. What is the reason for this difference? This question has puzzled me for a long time. I really appreciate it and hope that any teacher can help me answer it! Thank you so much!

Change Level BP:

My project settings: