Inventory resets randomly when disconnecting from LAN or Port Forwarded Server

On random chance, Minecraft will fail to save a player's data due to the game failing to stay at the same rate as the player. The player will be reset (inventory,xp, spawn, etc), but still have every advancement they have made. This also leads to the inability to break/place blocks, yet still allows the player to be seen, can walk around, and be talked to via chat. This has happened consistently through versions 20w18a-20w20a while playing multiplayer Minecraft with either friends that live an hour away or my sister in the same house. I would love to see this fixed, as I'm sure this will happen with realms as well, and I don't want to buy a realm and see something bad like this happen.