[PC] Keeping entity bug updated

Server spams this to the console. No loaded chunks have any minecarts or minecart entities in them that I have been able to determine. Typically followed by: Can't keep up ! Did the system time......

Actual console readout:
[Server thread/WARN]: Keeping entity minecraft:minecart that already exists with UUID xxxxxxxxxxxxxx (6 or 7 UUIDs in a row)