When updating a trigger, the triggerValue is ignored

[dynamodan]

Given this block of code:

function updateTwilioTrigger($sid, $count = 10) {
    
    $client = new \Twilio\Rest\Client(TWILIO_SMS_ACCOUNT_SID, TWILIO_SMS_AUTH_TOKEN);

    $trigger = $client->usage->triggers($sid)->update([
        'friendlyName' => "admin/cli.php updated trigger ".date("Y-m-d H:i:s"),
        'triggerValue' => "+".$count
    ]);
    
    return $trigger;
}

The triggerValue key in the returned trigger object stays the same, and the trigger is not fired.

Expected results: triggerValue should be updated, and trigger should fire again. Currently, the only way to do this is to delete the trigger and create a new one with the desired triggerValue.