When I add

        <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
      <version>1.1.10</version>
    </dependency>
    

or

    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.0</version>
    </dependency>

no bayesian validation is triggered, ever. I waited dozens of seconds, few minutes but no error marker was displayed next to the line of flawed version of a maven artifact.

I checked following:
Che server contains information about launching bayesian plugin in workspace
launch.sh and server.js are running for Bayesian in workspace
RECOMMENDER_API_TOKEN is not empty, there is a token