Amazon SNS endpoint getting disabled in php But when I log the response I am getting endpoint status as enabled

I am facing issue with SNS endpoint getting disabled when I make a call to SNS server. For debugging I added logs. In logs it is showing true and in Amazon SNS it is showing false. Please help me how to handle the situations

Following is the code I am writing for setting the endpoint Atrributes.

$enable_end_point = $client->setEndpointAttributes(array(
    'Endpoenter code hereintArn' => $pushlist[$i]['aws'],
    'Attributes' => array(
    'Enabled' => 'true'
    )`enter code here`
));

Log response I am getting from Amazon SNS server

data: get paramsGuzzle\Service\Resource\Model Object(
    [structure:protected] => 
    [data:protected] => Array
    (
        [Attributes] => Array(
            [Enabled] => true
            [Token] => xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        )

        [ResponseMetadata] => Array(
            [RequestId] => 1ef66366-6dc3-549a-8d38-2d4a5axxxxx
        )

    )
)

Publishing the notification

$result = $client->publish(array(
    'TargetArn' => $pushlist[$i]['aws'],
    'Message' => $msg_json,
    'Subject' => 'New xxxxx',
    'MessageStructure' => 'json',
));

Publish log:

data: publish resultGuzzle\Service\Resource\Model Object
(
    [structure:protected] => 
    [data:protected] => Array
    (
        [MessageId] => 5bbeb85f-75e7-5967-a55a-f673424xxxxx
        [ResponseMetadata] => Array
        (
            [RequestId] => 5c7f3df2-ff65-5bb5-a74a-73dec8cxxxxx
        )

    )
)

After publish I am checking the endpoint status through logs

data: get params after publishGuzzle\Service\Resource\Model Object
(
    [structure:protected] => 
    [data:protected] => Array
    (
        [Attributes] => Array
        (
            [Enabled] => true
            [Token] => xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        )
        [ResponseMetadata] => Array
        (
            [RequestId] => f3bdbb0d-9666-5b38-84a0-f521a1cxxxxx
        )

    )
)

In the above response I am getting endpoint status as true. But I am not getting any push notifications and on Amazon SNS status is showing as false.

Regards,

Vamsi