Building upon Elias' thread above, I too have encountered a similar Preview bug, but with locale & layout direction instead. This:

@Preview("Default")            // locale defaults to ""
@Preview("RTL", locale = "ar") // Arabic for RTL
@Composable
fun Something() {
    Text(stringResource(R.string.loading))
}

gives us that:

image.png

Explicitly using

locale = "en"

makes it go away, but I don't see why it should, when we can clearly see that strings are already correctly localized. Just that layout direction is picked up from "ar" (or perhaps the last @Preview annotation).

Switching the order makes me believe it is indeed the last Preview annotation that borks it up.

A couple of refreshes later — adding a space and deleting it — this is what happens. Now it's picking up the string from

ar

, but layout direction from

""

(default).

I'd create an issue, but :/