@Rodrigo Ah, that makes sense it might be a filtering order issue then:
https://docs.grails.org/6.1.0/guide/single.html#interceptorOrdering
Just a heads up I know someone is working on the melody plugin, so there might be some updates coming in the not too distant future.
However, a word of caution while Melody is a good tool for monitoring and finding performance issues, especially on a budget of free, the way it is instrumented in the plugin has been known to cause some weird issues, in certain code scenarios, if you look at the GitHub bug history.