Testing KumuluzEE with a bunch of components (amongst others the Bean Validation-component) I noticed that a SNAPSHOT-version of OpenJFX had become a dependency of KumuluzEE and found that HV was the culprit (https://hibernate.atlassian.net/browse/HV-1644), thus updating HV to 6.0.13.Final which resolves this.
Testing KumuluzEE with a bunch of components (amongst others the Bean Validation-component) I noticed that a SNAPSHOT-version of OpenJFX had become a dependency of KumuluzEE and found that HV was the culprit (https://hibernate.atlassian.net/browse/HV-1644), thus updating HV to 6.0.13.Final which resolves this.