Terminate Employment Transaction Approval Workflow stuck in 'In Progress'

Summary:

Terminate Employment Transaction Approval Workflow is stuck in 'In Progress' Status mode even though the appropriate approvers have approved the termination request. Upon checking the AssignmentTerminationsRuleSet, it shows that the transaction fails for our US Managers who initiates the request:

Rule Name	:	MSS_US
Rule Condition	:	( Task.payload.Worker's Current Assignment.result.Legislation Code == "US" )
Rule Component	:	[Task.payload.Worker's Current Assignment.result.Legislation Code, "US"]
Rule Evaluation Result	:	fail
Subexpressions Evaluating to False	:	[Task.payload.Worker's Current Assignment.result.Legislation Code == "US"]
Rule Attribute Value Map	:	{Task.payload.Worker's Current Assignment.result.Legislation Code:{}}
Rule Is Active	:	true