Snapshot of ArrayList deserializes to ArrayList

Hi

I use akka version 2.6.6 with scala version 2.13 for akka-serialization-jackson.

I want to save a snapshot from an AbstractPersistentActor’s state:

ArrayList<Foo> state

where Foo is defined as:

public class Foo {
    public final String name;
    public final double value;

    public Foo(String name, double value) {
        this.name = name;
        this.value = value;
    }
}

Akka tells me the correct serializer is used when saving the snapshot:
Using serializer [akka.serialization.jackson.JacksonCborSerializer] for message [java.util.ArrayList].
This is as expected because I added a serialization-bindings "java.util.List" = jackson-cbor

But when I get the SnapshotOffer and set state to the deserialized snapshot:

state = (ArrayList<Foo>) snapshotOffer.snapshot();

I get an ArrayList<scala$collection$immutable$Map$Map2> instead.

How can I prevent this and configure persistence such that I get an ArrayList<Foo> from the SnapshotOffer?
This should also work with more complex data structures than Foo.

I use inmem journal with local snapshot-store for testing.

Thanks!

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