Fails to replicate all rows when "insert into table select * from" operation performed

We are using Debezium oracle connector 1.6.1 to capture changes from Oracle 12.2 to Kafka. The single insert statements are successfully replicated to Kafka topic but the bulk inserts like 100 rows (insert into table select * from another_table where rownum<101) are not completly replicated to Kafka. We see only 15 out of 100 rows in Kafka topic for such insert statements.