Data from Amazon Kinesis to DynamoDB

I have to pass my data from Kinesis to DynamoDB. The problem is that not all the data arrive when my software is running. So when I restart my application a lot of records are added into DynamoDB. Now I don't know why the records don't arrived all within run time, but this is a big problem. The monitoring of resources is good, i tried both InitialPositionInStream.LATEST and InitialPositionInStream.TRIM_HORIZON without any change. Is it happened at someone?Is there a solution? There seems to be a buffer that save record. I used git code of aws. Maybe be it a network problem?