Nextcloud: can't customize app version from custom Eole³ Tools values file

By default, we can update image tag in a customized Eole³ Tools Helm values file with imageTag param, in that way for example :

 chart:
   version: 6.2.1
   imageTag: 28.0.11

But it doesn't work for Nextcloud addon, we need to manually add this in install/addons/nextcloud/nextcloud-values.yaml after generate it with the eole3 build command :

image:
  tag: 28.0.11

Is it possible to change this behavior ?