S3 sink connector

Kafka Connect
1

Hi,
I’m using the s3 sink connector with the following configs:

    "partitioner.class":"io.confluent.connect.storage.partitioner.TimeBasedPartitioner",
    "locale":"en",
    "path.format":"'date'=YYYY-MM-dd",
    "partition.duration.ms":"86400000",
    "rotate.interval.ms":"3600000",
    "timestamp.extractor":"RecordField",
    "timestamp.field": "dateCreated"

and also:
"flush.size": "100"

My issue is that in s3 I see files are keeping modifying in past partitions, this prevents me to run daily jobs (say at 00:00 UTC on the past partitions)

What might be the reason? how can I make sure all data is flushed at 00:00?