Hi.

I detect strange bug. Substitution Array class is not working. Try this:

s := ByteArray new writeStream.

serializer := FLSerializer newDefault.

serializer analyzer��

�� �� �� �� when: [ :o | o==Array ]��

�� �� �� �� substituteBy: [ :o | ��#instead ].

�� ��serializer serialize: {Array} on: s

.

s2 := s contents readStream.

object := (FLMaterializer newDefault materializeFrom: s2) root.

Interesting that other classes are working correctly.

I open issue��17669