Producing a batch of events to the same kafka topic overwrite each other - apache-kafka

Question

I'm trying to produce two events to the same kafka topic in a batch, only the second event ends on kafka and the first is not sent.
// sudo code of what i'm doing
// producer
await kafka.produce(
event1 { message: "vito", topic: "corleone" },
event2 { message: "sonny", topic: "corleone" }
event3 { message: "fredo", topic: "corleone" }
)
// consumer listening to topic "corleone"
kafka.handler(payload) {
log(payload) // prints "fredo" but doesn't print "vito" or "sonnie"
}
What works though is if I have these events go to different topics:
// producer
await kafka.produce(
event1 { message: "vito", topic: "corleone" },
event2 { message: "sonny", topic: "deadinpart1" }
event3 { message: "fredo", topic: "deadinpart2" }
)
If I do that, I receive all three events (by listening to the three topics) which makes me think that Kafka might not be supporting multiple messages to the same topic in a batch.
My producer settings looks like this:
const kafkaConfig: KafkaConfigSchema = {
brokers: config().kafka.brokers, // array of brokers
useSasl: config().kafka.useSasl, // true
useSsl: config().kafka.useSsl, // true
username: config().kafka.username,
password: config().kafka.password,
groupId: config().kafka.groupId, // a unique string
};
Are there any settings I am missing or am I doing something wrong architecturally by sending messages that share the topic in the same batch?