@quasar/icon-factory different results between 'build' and 'dev' ?

[s-light]

Hi all,
i don’t know if this would be better posted as issue in the icon-factory repository -
could be related:
#57 Move Cache into .icon-factory
#64 Extension always rebuild image set

the icon-factory created a folder ‘static’ in my root project directory with all the build icons.
i added them to git, as i thought - fine lets track these asserts…
but if i switch between quasar dev and quasar build --debug these files get recreated -
but i configured the minification to the same for both:

{
  "@quasar/icon-factory": {
    "minify_dev": "optipng",
    "minify_build": "optipng",
    "cordova": {
      "background_color": "#000074",
      "splashscreen_type": "pure"
    },
    "build_always": false,
    "__internal": {
      "dev": {
        "spa": {
          "iconHash": "a02f4f34575297041747ae059a203f2c"
        },
        "electron": {
          "iconHash": "a02f4f34575297041747ae059a203f2c"
        }
      },
      "build": {
        "spa": {
          "iconHash": "a02f4f34575297041747ae059a203f2c"
        },
        "electron": {
          "iconHash": "a02f4f34575297041747ae059a203f2c"
        }
      }
    }
  }
}

also when i set "minify_build": "optipng", then do a quasar build and then try again but change to "minify_build": "zopfli", the icon files do not change (according to git)

any thoughts are welcome

sunny greetings
stefan