Empty extraData needed to update a renderItem?

[GaylordP]

Hello and thank you for your library :)

I am trying to migrate from FlatList to FlashList, and I am experiencing a behavior that I don’t understand.
It is so basic that I don’t think it’s necessary to open an issue.

In this very simple case, I apply a backgroundColor when an item is selected: https://snack.expo.dev/htmtuhwVVrKx2_WwLo1Q0

However, this case only works because I have added extraData={[]}.
If you comment out the line extraData={[]}, it will no longer work.
I have read the documentation thoroughly, and I don’t understand why it doesn’t work if I remove this property—let alone the influence it has on the rendering, especially with an empty array.

Could someone help me?
Thanks in advance.