Whitescreen after initial IOS-TestFlight installation

When I open my Meteor App for the first time in TestFlight i get a whitescreen. After closing the App and restarting everything works fine. Has anyone solved this?
See video

System:
Meteor 1.6.0.3

package.json:

"dependencies": {
  "@babel/runtime": "^7.0.0-beta.42",
  "bcrypt": "^2.0.1",
  "better-npm-run": "^0.1.0",
  "bson": "^3.0.0",
  "bson-ext": "^2.0.0",
  "core-js": "^2.5.7",
  "dezalgo": "^1.0.3",
  "fibers": "^2.0.2",
  "fixed-header-table": "^1.3.0",
  "gridfs-stream": "^1.1.1",
  "localforage": "^1.4.3",
  "localforage-cordovasqlitedriver": "^1.5.0",
  "meteor-node-stubs": "^0.4.1",
  "pdfmake": "^0.1.35",
  "qrcode-react": "^0.1.16",
  "react": "^15.0.0",
  "react-addons-pure-render-mixin": "^15.0.0",
  "react-dom": "^15.0.0",
  "react-hammerjs": "^0.5.0",
  "react-loader": "^2.4.5",
  "react-mixin": "^3.0.3",
  "react-mounter": "^1.2.0",
  "react-select": "^1.0.0-rc.3",
  "react-spinjs": "^3.0.0",
  "react-sticky-table": "^1.2.0",
  "require": "^2.4.20",
  "simple-react-modal": "^0.4.8"
},
"devDependencies": {
  "babel": "^6.3.26",
  "babel-core": "^6.3.26",
  "babel-loader": "^6.2.0",
  "babel-plugin-add-module-exports": "^0.1.2",
  "babel-plugin-react-transform": "^2.0.0",
  "babel-plugin-system-import-transformer": "^2.4.0",
  "babel-plugin-transform-decorators-legacy": "^1.3.2",
  "babel-preset-es2015": "^6.3.13",
  "babel-preset-react": "^6.3.13",
  "babel-preset-stage-0": "^6.3.13",
  "css-loader": "^0.28.11",
  "expose-loader": "^0.7.1",
  "extract-text-webpack-plugin": "^0.9.1",
  "file-loader": "^1.1.11",
  "json-loader": "^0.5.4",
  "moment-timezone": "^0.5.17",
  "mongobackup": "^0.3.5",
  "react-dom": "^0.14.0",
  "react-transform-catch-errors": "^1.0.0",
  "react-transform-hmr": "^1.0.1",
  "style-loader": "^0.21.0",
  "url-loader": "^1.0.1",
  "webpack": "^1.13.0",
  "webpack-hot-middleware": "^2.21.0",
  "redbox-react": "^1.2.0"
}

.meteor/packages:

meteor-base@1.3.0             # Packages every Meteor app needs to have
mobile-experience@1.0.5       # Packages for a great mobile UX
mongo@1.4.2                   # The database Meteor supports right now
jquery@1.11.10                # Helpful client-side library
tracker@1.1.3                 # Meteor's client-side reactive programming library


react-meteor-data

### FOR MAC
webpack:webpack
#########

### FOR WINDOWS
#meteorcom:webpack
#react-runtime
##############


webpack:react
webpack:css
webpack:assets

accounts-ui@1.3.0
accounts-password@1.5.0
blaze-html-templates ## Is this used?
meteorhacks:flow-router
standard-minifier-css@1.4.0
standard-minifier-js@2.3.1



#FROM OLD PROJECT
session@1.1.7                 # Client-side reactive dictionary for your app
u2622:persistent-session
momentjs:moment
rzymek:moment-locale-de
underscore@1.0.10
jspdf:core
jspdf:autotable
email@1.2.3
ccorcos:clientside-image-manipulation  ## Used in UserProfile: FileInputButton
mdg:camera
alanning:roles


mdg:reload-on-resume
dynamic-import@0.3.0
ground:db
url@1.2.0
ostrio:files
webapp@1.5.0