Shipping Methods don't display even fields it's complete

Hi everyone

i have a problem which it’s been a long time i tried to figure it out. The fact is i have account system with firebase and when a user it’s connected, they have their own information. when they are on the checkout page all informations are already completed but the problem is the shipping methods don’t display whereas address field is already complete, i have to modify the address field for shipping methods is showing. it’s a little bit annoying. if someone can help, thanks

Sorry i can’t share the website because it’s private from my client

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