Jenkins helm chart property controller.containerSecurityContext

Hello guys,

I am deploying the jenkins helm chart into an aks cluster setup is below.
Is there a bit more documentation about controller.containerSecurityContext?
Besides:

I want to set controller.containerSecurityContext.readOnlyRootFilesystem to false. When deploying the pod doesn’t get initialized, it seems to have issues accessing configuration or volumes. Note I am using dynamic PVs with storage classes.

This is a snippet of my values file:

clusterZone: ""
renderHelmLabels: true
controller:
  componentName: "jenkins-controller"
  image: "jenkins/jenkins"
  tag: "2.426.3"
  imagePullPolicy: "Always"
  imagePullSecretName: pullsecret
  jenkinsHome: "/var/jenkins_home"
  jenkinsRef: "/usr/share/jenkins/ref"
  jenkinsWar: "/usr/share/jenkins/jenkins.war"
  usePodSecurityContext: true
  runAsUser: 1000
  fsGroup: 1000
  containerSecurityContext:
    runAsUser: 1000
    runAsGroup: 1000
    readOnlyRootFilesystem: true
    allowPrivilegeEscalation: false
  installLatestPlugins: true
  installLatestSpecifiedPlugins: false
  initializeOnce: false
  overwritePluginsFromImage: false
  enableRawHtmlMarkupFormatter: true
  sidecars:
    configAutoReload:
      enabled: false
      image: kiwigrid/k8s-sidecar:1.15.0
      imagePullPolicy: IfNotPresent
      resources: {}
      reqRetryConnect: 10
      sshTcpPort: 1044
      folder: "/var/jenkins_home/casc_configs"
      containerSecurityContext:
        readOnlyRootFilesystem: true
        allowPrivilegeEscalation: false
  testEnabled: true
persistence:
  enabled: true
  existingClaim:
  storageClass: managed
  accessMode: "ReadWriteOnce"
  size: "10Gi"
  volumes:
  mounts:
checkDeprecation: true

I removed all key pair values which I deemed unnecessary, let me know if there is information you require.
Normally I am also using JCasC and the sections in it (job-dsl, unclassified, cloud-config etc.)

kubectl logs pod:

Defaulted container "jenkins" out of: jenkins, init (init)
Error from server (BadRequest): container "jenkins" in pod "test-jenkins-0" is waiting to start: PodInitializing

Any hints/ideas are appreciated. Thank you!

Jenkins setup:
Jenkins: 2.426.3
OS: Linux - 5.15.0-1053-azure
Java: 17.0.9 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
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