LongestPrefix function is not finding partial matches

[oglok]

After storing a prefix like:

"How many people live in the world?"

Using the LongestPrefix function with "How many people live in Europe?" returns false:

LongestPrefix result","matchedPrefix":"","val":null,"found":false}

Isn't it supposed to return "How many people live in"?

[oglok]

https://go.dev/play/p/BXAJNUWr_ym