bug: Extended JSON scalar serialization not working for mutation input

I am using JSON scalar from DGS extended scalar library but it is failing to serialize it to input JsonObject.

Expected behavior

JSON scalar should be serialized to JsonObject

Actual behavior

JSON Scalar serialization to input JsonObject is failing

Steps to reproduce

I am using JSON from DGS extended scalar library, This the version I am using:

<dependency>
    <groupId>com.netflix.graphql.dgs</groupId>
    <artifactId>graphql-dgs-platform-dependencies</artifactId>
    <version>8.1.1</version>
</dependency>
<dependency>
    <groupId>com.netflix.graphql.dgs</groupId>
    <artifactId>graphql-dgs-extended-scalars</artifactId>
    <version>8.1.1</version>
</dependency>

This is my mutation schema:

saveSession(session: SaveUserSessionInput!): String
data class SaveUserSessionInput(
val pageToLoad: String?,
var entries: MutableList<JsonObject>? #(com.google.gson.JsonObject)
)

This is how I am calling it:

mutation {
    saveSession(
      session: {pageToLoad: "Symptom", entries: [{key: "Symptom", value: "dummy_symptom_value"}]}
    ) {
      message
    }
  }

While running the mutation I am getting this error: com.netflix.graphql.dgs.exceptions.DgsInvalidInputArgumentException: Input argument type 'class com.google.gson.JsonObject' doesn't match input {key=Symptom, value=dummy_symptom_value}

Stacktrace:

0 = {StackTraceElement@20372} "com.netflix.graphql.dgs.internal.DefaultInputObjectMapper.mapToJavaObject(DefaultInputObjectMapper.kt:160)"
1 = {StackTraceElement@20373} "com.netflix.graphql.dgs.internal.DefaultInputObjectMapper.convertList(DefaultInputObjectMapper.kt:230)"
2 = {StackTraceElement@20374} "com.netflix.graphql.dgs.internal.DefaultInputObjectMapper.mapToKotlinObject(DefaultInputObjectMapper.kt:78)"
3 = {StackTraceElement@20375} "com.netflix.graphql.dgs.internal.method.InputObjectMapperConverter.convert(InputObjectMapperConverter.kt:41)"
4 = {StackTraceElement@20376} "org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:41)"
5 = {StackTraceElement@20377} "org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:192)"
6 = {StackTraceElement@20378} "com.netflix.graphql.dgs.internal.method.AbstractInputArgumentResolver.convertValue(AbstractInputArgumentResolver.kt:79)"
7 = {StackTraceElement@20379} "com.netflix.graphql.dgs.internal.method.AbstractInputArgumentResolver.resolveArgument(AbstractInputArgumentResolver.kt:48)"
8 = {StackTraceElement@20380} "com.netflix.graphql.dgs.internal.method.ArgumentResolverComposite.resolveArgument(ArgumentResolverComposite.kt:39)"
9 = {StackTraceElement@20381} "com.netflix.graphql.dgs.internal.DataFetcherInvoker.invokeKotlinMethod(DataFetcherInvoker.kt:104)"
10 = {StackTraceElement@20382} "com.netflix.graphql.dgs.internal.DataFetcherInvoker.get(DataFetcherInvoker.kt:70)"
11 = {StackTraceElement@20383} "graphql.schema.DataFetcherFactories.lambda$wrapDataFetcher$2(DataFetcherFactories.java:37)"
12 = {StackTraceElement@20384} "com.netflix.graphql.dgs.metrics.micrometer.DgsGraphQLMetricsInstrumentation.instrumentDataFetcher$lambda$3(DgsGraphQLMetricsInstrumentation.kt:142)"
13 = {StackTraceElement@20385} "graphql.execution.instrumentation.dataloader.DataLoaderDispatcherInstrumentation.lambda$instrumentDataFetcher$0(DataLoaderDispatcherInstrumentation.java:90)"
14 = {StackTraceElement@20386} "graphql.execution.ExecutionStrategy.invokeDataFetcher(ExecutionStrategy.java:309)"
15 = {StackTraceElement@20387} "graphql.execution.ExecutionStrategy.fetchField(ExecutionStrategy.java:286)"
16 = {StackTraceElement@20388} "graphql.execution.ExecutionStrategy.resolveFieldWithInfo(ExecutionStrategy.java:212)"

Netflix / dgs-framework