Hi, Experter

I encounter an issue that records lost when called PutRecords api to send data to kinesis.
It returns no error when call PutRecords in producer side.
But no records get in customer side.
It happens in low probability, and hard to reproduce.
Did you encounter this, or it is fixed in latest version?
tag:0.3.0
Thank you in advance!

Other question is:
Where can I find AWS_SECURITY_TOKEN.
There is no such a key in tag:0.3.0. And I can't find the key on aws console.