Thermometer malfunction

Our VAVA wearable thermometer set off an alarm today showing our baby’s temperature was 129 degrees. We immediately checked her temperature, and she was normal. We reset the base, and it set off an alarm again saying the same 129 degree temp. We did this a third time, and it happened yet again. We were worried the electrical component in the thermometer itself that receives the charge may be overheating so we finally removed the thermometer from our sleeping baby. We are concerned as to what caused the thermometer to continuously set off alarms and give false readings of such a high temperature, and we want to be able to trust it as a reliable by way to protect our daughter who is prone to febrile seizures .