Local notifications attachments do not appear

Hello,

I have a problem displaying images in local notifications on Android device (Android 7). I tried a lot of things in “attachment” property of notifications (absolute https/http urls, local URIs (file:///, file://, http://localhost…), raw svg, raw base64, simple text…) but the notifications never display any image in their body…

I know it can work on my device because I receive almost everyday this kind of notifications embedding images from some of my applications…

Here is my setup :

"dependencies": {
    "@capacitor/android": "^3.0.0-rc.1",
    "@capacitor/app": "^0.3.7",
    "@capacitor/camera": "^0.4.4",
    "@capacitor/core": "^3.0.0-rc.1",
    "@capacitor/filesystem": "^0.5.3",
    "@capacitor/haptics": "^0.3.7",
    "@capacitor/keyboard": "^0.6.0",
    "@capacitor/local-notifications": "^0.6.1",
    "@ionic/storage": "^3.0.4",
    "@ionic/vue": "^5.4.0",
    "@ionic/vue-router": "^5.4.0",
    "android-native-http": "file:../android-native-http",
    "axios": "^0.21.1",
    "core-js": "^3.6.5",
    "es6-promise": "^4.2.8",
    "ionicons": "^5.5.1",
    "luxon": "^1.26.0",
    "vue": "^3.0.0-0",
    "vue-router": "^4.0.0-0",
    "vuex": "^4.0.0"
  },
  "devDependencies": {
    "@capacitor/cli": "^3.0.0-rc.1",
    "@types/jest": "^24.0.19",
    "@types/luxon": "^1.26.3",
    "@typescript-eslint/eslint-plugin": "^2.33.0",
    "@typescript-eslint/parser": "^2.33.0",
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/cli-plugin-e2e-cypress": "~4.5.0",
    "@vue/cli-plugin-eslint": "~4.5.0",
    "@vue/cli-plugin-router": "~4.5.0",
    "@vue/cli-plugin-typescript": "~4.5.0",
    "@vue/cli-plugin-unit-jest": "~4.5.0",
    "@vue/cli-service": "~4.5.0",
    "@vue/compiler-sfc": "^3.0.0-0",
    "@vue/eslint-config-typescript": "^5.0.2",
    "@vue/test-utils": "^2.0.0-0",
    "eslint": "^6.7.2",
    "eslint-plugin-vue": "^7.0.0-0",
    "typescript": "~3.9.3",
    "vue-jest": "^5.0.0-0"
  },

and sample code used :

import { LocalNotifications } from '@capacitor/local-notifications';
LocalNotifications.schedule({
            notifications: [
                {
                    id: 2,
                    //schedule: { every: 'minute' },
                    body: "Voyant allumé!",
                title: "Sensor ",
                actionTypeId: "SENSOR_NOTIF",
                attachments: [
                    {
                        id: "1",
                        url: //all tests here!,
                    },
                ],
                }
            ]
        })

Thanks for your help!