As described in Strimzi#6884 - we found strange behavior of TopicOperator, when we want to set "forbidden settings". Expected is that TopicOperator will not change the settings and the topic should be in NOT_READY state (with proper message). But now, when we set the forbidden settings, the TO either set the config to KafkaTopic (and the status will stay in READY state) or the config stay the same, without any exception or any other message thrown.