Kinesis Data Stream GetRecords giving Junk Data - amazon-web-services

Question

While doing the Getrecords from Kinesis Data Stream it is is giving values like ����Y�ݽ#��5���I$ݔѵ�����ս��aQ���̽�9������ռ�� intermittently. I have a large data and the Junk data comes in between the correct data.
My Code is Nodejs in Lambda and is triggered by SQS (which is a DLQ of an upstream lambda that process the Kinesis Stream) . This lambda is expected to do the reprocessing logic of the failed messages of the upstream lambda.
Any suggestion would be very helpful. Thanks.
Sample Data :
{ "Attribute1" : "Value with over 400 charcters available ����Y�ݽ#��5���I$ݔѵ�����ս��aQ���̽�9������ռ�� . to make it work" , "Attribute2" : "value2" , "Attribute3" : "value3"}
var getKinesisRecords = async function (shardIterator){
var getParams = {
ShardIterator: shardIterator,
Limit: 1
};
await kinesis.getRecords(getParams, function(err, result) {
if (err) {console.log(err, err.stack); return null;}// an error occurred
else {
try {
for (var record in result.Records) {
var data = result.Records[record].Data
console.log("Kinesis Record data"+data);
}
} catch(err) {
console.log("Error while getting Record from Kinesis");
console.log(err);
return null;
}
if (result.NextShardIterator) getKinesisRecords(result.NextShardIterator);
} // successful response
}).promise();
//Process the record
}