exception when producing larger messages in kafka-ui

[sdy72]

Hi Kafka-ui community

When we try to produce a message manually through the UI and larger than a certain size we get error.
Example message size could be ~330KB.

500 Internal Server Error
Exceeded limit on max bytes to buffer : 262144

org.springframework.core.io.buffer.DataBufferLimitException: Exceeded limit on max bytes to buffer : 262144

In the documentation there is mentioned webclient.max-in-memory-buffer-size which defaults to 20MB. It could be increased in configuration but it doesn't seem to relate to this problem if message is just few kilobytes larger than 262KB. What could his be about?

Thanks in advance