We play online splitscreen, traveled together, used linked nether portal from home base through nether to another linked portal and finally to a second base about 2000 blocks away. After a couple hours of exploration about 1000 blocks around second base, we went back home through same portal highway. Upon return home every entity within the 2 chunks around our base dissapeared or despawned. Some had name tags, many  were tamed. Every villager had been traded with many even masters. Armor stands with fully enchanted netherite gone. Soo terribly disappointed, never thought an update from mojang would grief my world soo bad.