TurboExecutive Classic Confinement

I just tried, providing the following in package.json of my project.
Looks like Tray is shown, but contextual menu doesn’t work.
Changing the confinement with classic it works.

"build": {
    "productName": "turboSMTP Executive Monitor",
    "appId": "io.deliverytech.turbosmtpexecutivemonitor",
    "artifactName": "${productName}-${version}.${ext}",
    "linux": {
      "category": "network",
      "target": [
        "snap",
        "deb"
      ]
    },
    "snap": {
      "confinement": "strict",
      "stagePackages": [
        "default"
      ],
      "environment": {
        "HOME": "$SNAP_USER_COMMON",
        "TMPDIR": "$XDG_RUNTIME_DIR",
        "XDG_CURRENT_DESKTOP": "Unity",
        "DISABLE_WAYLAND": 1
      },
      "plugs": [
        "avahi-observe",
        "browser-support",
        "cups-control",
        "gsettings",
        "opengl",
        "home",
        "desktop",
        "desktop-legacy",
        "mount-observe",
        "network",
        "network-bind",
        "network-observe",
        "password-manager-service",
        "pulseaudio",
        "removable-media",
        "screen-inhibit-control",
        "unity7",
        "x11"
      ]
    }
  }