The same thing happened when I updated version 1.15.5.13 to 1.15.6.8.
I am using the following keys. However, a new key is created and serialized.
Imported value is displayed as Arry.
name-kana-sei
name-kana-mei
https://gyazo.com/de3a1c8eb6306055f66dd1973d664cd8
thank,
