Drools: How to use an enum in the lhs of a rule?

This works for me:

rule "my rule"
when
    Ticket(status == EStatus.OK)
then
    ...
end

so that should work too:

rule "my rule"
when
    EStatus(this == EStatus.OK)
then
    ...
end

Verify if it still occurs in Drools 5.3 and file a bug if it does in jira