Grails 4 Audit Logging w/ Spring Security does not record "Actor"

I'm using Spring Security Rest and the Grails Audit Logging plugin. Audit log records are being created with all the correct information except the actor property is always saved with the defaultActor value.

Below is my configuration. Does anyone have any ideas? What should I be looking for? Thanks in advance for your time.

build.gradle

ext.springSecurityRestVersion = '3.0.0.RC1'
dependencies {
    ...
    compile "org.grails.plugins:spring-security-rest:${springSecurityRestVersion}"
    compile "org.grails.plugins:spring-security-rest-gorm:${springSecurityRestVersion}"
    compile 'org.grails.plugins:audit-logging:4.0.3'
    ...
}

application.yml

grails.plugin.auditLog:
  auditDomainClassName: "us.mycompany.api.AuditLogEvent"
  logFullClassName: false
  defaultActor: "mycompany"

grails.plugin.springsecurity:
  userLookup.userDomainClassName: 'us.mycompany.api.Person'
  userLookup.authorityJoinClassName: 'us.mycompany.api.PersonRole'
  authority.className: 'us.mycompany.api.Role'
  filterChain.chainMap:
    #Stateless chain
    - { pattern: '/**', filters: 'JOINED_FILTERS,-exceptionTranslationFilter,-authenticationProcessingFilter,-securityContextPersistenceFilter,-rememberMeAuthenticationFilter' }
  rest.token:
    storage.gorm.tokenDomainClassName: 'us.mycompany.api.AuthenticationToken'
    validation:
      useBearerToken: false
      enableAnonymousAccess: true

As I debugged this, it seems like the springSecurityService dependency in SpringSecurityRequestResolver was null, so I had to explicitly wire SpringSecurityRequestResolver in resources.groovy.

I know that I shouldn't have to do that, but it did fix my problem, so this is at least a workaround.

resources.groovy

import grails.plugins.orm.auditable.resolvers.SpringSecurityRequestResolver

beans = {
    auditRequestResolver(SpringSecurityRequestResolver) {
        springSecurityService = ref('springSecurityService')
    }
}