BusinessRuleTask no longer maps rule output to custom wrapper process variable

 Steps to Reproduce

1. Define process variable of type ProcessVariable (custom wrapper).
2. In the process, create a Business Rule Task , linked to ruleflow group RuleExecution
3. The DRL used:

4. ruleflow-group "RuleExecution"
   rule "RuleExecution_test"
   when
   output : ProcessVariable()
   then
   output.put("SKIP_VERIFICATION", "YES");
   end

1. Connect Business Rule Task → Exclusive Gateway that checks SKIP_VERIFICATION.

       6. Execute the process.

• The rule fires successfully (confirmed by System.out debug logs).

• ProcessVariable.put("SKIP_VERIFICATION", "YES") executes as expected.

• Immediately after rule execution, the process variable seen by the gateway is empty  

• The Exclusive Gateway takes the “NO” path.