Slot is storing as a list

i facing issue that my location slot is considered a list instead of string sometimes

I am submitting my code link:

TULSA - worked (string) tulsa - worked (string) Tulsa - didn’t work ( List)

Don’t know why it is behaving like this? link for my code: Upload files · omkarcpatilgithub/Rasa_episode8 · GitHub

Could you post the specific code snippets involved? It’s easier for people to answer if they don’t have to go through your whole repository.

had to give more utterances in nlu file for solving the issue