Well, there is no problem with NanoWallet's logout & login, but if I reload or close the browser and reopen it, the entire address book will disappear.
I am concerned that the value of ngStorage-contacts is fixed by the value when using the address book for the first time.
The first time I used the address book was the version (Jeff PM Ver.) that was released in part on the day before the official release.
Perhaps, I thought whether the specification is different from the official release version, and deleted ngStorage-contacts, it started to work normally. Even if I reload, the address book will now remain.