Scheduled Event (V2) contains non-object detail parameter (it is a string)

[peniakoff]

When I'm using ScheduledEvent as a source event in the lambda handler where actually Amazon EventBridge Scheduler's Schedule is a trigger for the function, I'm getting

An error occurred during JSON parsing: java.lang.RuntimeException
java.lang.RuntimeException: An error occurred during JSON parsing
Caused by: java.io.UncheckedIOException: com.amazonaws.lambda.thirdparty.com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `java.util.LinkedHashMap` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('
{}
')
 at [Source: (ByteArrayInputStream); line: 1, column: 318] (through reference chain: com.amazonaws.services.lambda.runtime.events.ScheduledEvent["detail"])
	at com.amazonaws.services.lambda.runtime.serialization.factories.JacksonFactory$InternalSerializer.fromJson(JacksonFactory.java:199)
Caused by: com.amazonaws.lambda.thirdparty.com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of `java.util.LinkedHashMap` (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('
{}
')

because "detail" parameter in that event is not an object - it is a string. Look at this sample below from Java logger:

Event: {
    "version": "0",
    "id": "4e6638b7-b892-4482-9762-8c58d4e71ebb",
    "detail-type": "Scheduled Event",
    "source": "aws.scheduler",
    "account": "xxx",
    "time": "2024-05-06T10:58:00Z",
    "region": "eu-west-1",
    "resources": [
        "arn:aws:scheduler:eu-west-1:xxx:schedule/default/xxx"
    ],
    "detail": "{}"
}

IMO AWS should fix this event source for sending object-compatible field or we should implement new class e.g. ScheduledV2Event with a String type, not a Map. It looks like the "old" Scheduled Event is not compatible with the new Scheduled V2 Event.