Vector remap VRL , variable assignment not working

[itpatterns]

I have this transform block in my vectol toml. I get value in log if directly print parsred value but same not working if assigned to a variable .topic_value

[transforms.get_asset_from_cmdb_msg]
type = "remap"
inputs = ["node_exporter_os_metrics"]
source = '''
log("Raw event: " + encode_json(.))

log("Kafka topic is: " + string!(.tags.kafka_topic))

.topic_value = string!(.tags.kafka_topic)
log("Topic from tags: " + .topic_value)

output showing null for "Topic from tags:"
vector | 2025-07-03T06:11:58.671718Z INFO transform{component_kind="transform" component_id=get_asset_from_cmdb_msg component_type=remap}: vrl::stdlib::log::implementation: Internal log [Kafka topic is: ros-prometheus_metrics] is being suppressed to avoid flooding.
vector | 2025-07-03T06:11:58.671728Z INFO transform{component_kind="transform" component_id=get_asset_from_cmdb_msg component_type=remap}: vrl::stdlib::log::implementation: Internal log [Topic from tags: ] is being suppressed to avoid flooding.

[pront]

Hi @itpatterns, can you share a sample metric? You can share all the logs before the flood warning. This playground example might help.

[itpatterns]

Thanks for @pront, I will explore with the playground. I will share more details later.