Address change while waiting

Can we buy a house and change address while I 485 is filled.

Why can’t you buy a house and change address? Who told you?

Because medical copy will be in old address. Even if we file AR11 form, properly details will not be updated.

Why would the medical be affected by your address change?

Medical validates your health and not the address.

Who has told you all this? I don’t see any connection here.