AfterInvokeBKMEvent fired by DMN runtime doesn't contain metadata

Create a DMN runtime and attach a listener. Trigger evaluation of a DMN model containing a BKM with a DMNContext containing some fields in the metadata. Check the metadata of AfterInvokeBKMEvent received by the listener via event.getResult().getContext().getMetadata() . Expected result Metadata should be the same of the initial DMNContext . Actual result Metadata are empty.