When it was restarted due to an error, the world was destroyed.

In the world of survival, I was leveling and building buildings to build Japanese-style architecture and Japanese-style townscapes, but when the first house was about to end, green dye was needed, so Nintendo Swit to grow cactus I left ch alone. When I left it for about 6 hours and looked at the screen of Nintendo Switch, an error occurred and Minecraft was down. This has happened so often, so I restarted Minecraft as usual. However, when I went to the world of survival, there were few buildings that had been built, the land that had been leveled, and other buildings that had been built until then, and there were no Japanese-style architecture left. The cactus harvester for collecting green dyes and the sheep's fence for collecting wool were also gone, and the sheep were grazing. At first, I thought it was rolled back, but the inventory contained items in the middle of construction, so the materials and building materials used for construction disappeared somewhere. It's practically vandalized. Is this a bug? After all, is there a limit to Minecraft on Nintendo Switch?