electron-builder: Electron-Updater differential update fails with operation overlaps previous operation

• electron-builder: Version 20.36.2
• electron-updater: Version 4.0.4
• Target: nsis-web
• System: Windows

The AutoUpdater gives me this error… [2018-11-18 17:01:42.356] [error] Cannot download differentially, fallback to full download: Error: operation (block index: 23902, checksum: Vx/fVEzWD3gMPbOsQJC+QZlJ, kind: COPY) overlaps previous operation (checksum: Vx/fVEzWD3gMPbOsQJC+QZlJ): abs: 7267809 until 500356092 and 500206446 until 500238540

… using this configuration

"build": {
    "appId": "<appId>",
    "nsisWeb": {
      "oneClick": true,
      "perMachine": false,
      "differentialPackage": true
    },
    "publish": {
      "provider": "generic",
      "url": "https://<username>:<password>@<URL>"
    },
    "win": {
      "icon": "./lib/resources/icons/icon.ico",
      "target": "nsis-web"
    },
    "files": [
      "*.js",
      "build/**/*",
      "node_modules/**/*"
    ]
  },

The connection to the server seems to work as the updater can find the new version and successfully falls back to the full download. The package.7z exists in the {User}/AppData/Local/{name}-updater.

Thanks in advance.