A client is having intermittent problems with park calls. First occurance - A call was answered at receptionist phone. The call was parked at SP0. The light should have changed from green to red. But it stayed green. Second occurance - A call was answered at the breakroom phone. The call was parked at SP0. The light changed from green to red accordingly on the kitchen phone. However, when another employee wanted to pickup the SP0 from their phone, the light was green and unable to pick up. The 3cx is version 11 SP4. The phones are T38G with firmware 188.8.131.52.