JsonDecodingException with ignoreUnknownKeys

[singhangadin]

Describe the bug I am using KotlinxSerializer with Ktor in KMM Project. While doing so, I am getting JsonDecodingException (Stacktrace) for a key in JSON response I haven't added in the POJO. As mentioned in the docs I have set both isLenient and ignoreUnknownKeys flags, to resolve the issue but It doesn't seem to make any difference. You can check the snippet below to get an idea of how I am using the feature in my HttpClient

import kotlinx.serialization.json.Json as KotlinJson

install(JsonFeature) {
    serializer = KotlinxSerializer(
        KotlinJson {
            isLenient = true
            ignoreUnknownKeys = true
        }
    )
}

To Reproduce You can check the implementation in this repo: https://github.com/Angads25/KMM-Ktor-Features Although the code is not updated, the overall implementation hasn't changed.

Environment

• Ktor Version: 1.6.1
• Kotlin version: 1.5.10
• Library version: 1.2.2
• Kotlin platforms: KMM
• Gradle version: 6.7.1
• IDE version: Android Studio 4.2.2
• OS Version: Big Sur, Version: 11.4
• JDK Version: 11.0.6

Please feel free to ask for any other information not mentioned in the issue description.

[sandwwraith]

You're using a default instance instead of one you configured here: https://github.com/Angads25/KMM-Ktor-Features/blob/master/shared/src/commonMain/kotlin/com/github/angads25/kmmsampleapp/repository/NetworkUseCase.kt#L27