Locating rare structures can show co-ords outside of the world

When you teleport to the world border and then use /locate Mansion, for example, it can show coords outside of the world. The image shows the proof. Tested in 1.15.1 and 1.16.1

Recreation:
/tp @s 29999950 100 29999950
/locate mansion

/tp @s 30001184 ~ 30001472
>> Invalid location to teleport