librdkafka Idempotence producer NOT working(msg gaps present) when Kafka (Java) broker process (1 out of 3 brokers) is frozen and released

Question

Operating system Linux 7.9. librdkafka(v1.6) Producer configs

enable.idempotence=true #we need orderly msgs without gaps to be written in kafka
message.timeout.ms=30000  #a lower value(30 seconds) set for testing purpose
enable.gapless.guarantee=true

Kafka version=kafka_2.12-2.7.0 and it has 3 brokers. Topic Replication factor is 2.
Please assume below test scenario,

1. Producer produce msgs A, B, C(in given order) to same topic partition.
2. One of the Kafka broker processes(which contains above topic partition) is frozen(in bash: kill -s stop "pid of kafka broker process")
3. Producer produce msgs (i.e. RdKafka::Producer::produce) D, E, F
4. Since message.timeout.ms was set to 30seconds, librdkafka gives a delivery failed error after 30 seconds.
5. Fatal Error handling step(pls refer below)
6. Above frozen Broker process is released (kill -s cont)

I tried different below Fatal Error handling steps,

1. Call RdKafka::Producer::flush with a 5min timeout and delete RdKafka::Producer object (re-created later)
2. Call RdKafka::Producer::purge(PURGE_QUEUE) and delete RdKafka::Producer object (re-created later)
3. Killing the C++ (my)process with kill(getpid(), SIGKILL)/exit()

but all of them result in a condition where some of the msgs in mid of above #3(produce while Broker frozen) are NOT written to Kafka.
e.g. msgs D and F written, BUT msg E is NOT written.

How can I resolve this ? i.e. avoid missing msgs in mid. (then I can re-start writing from the last written msg onwards)

My attempt is to handle Kafka FATAL errors (Delivery failures/produce failures(other than QUEUE_FULL)/error callback fatal error) gracefully.