cordova-ios no longer installs new app to simulator

When running

```
ionic run ios --emulator
```

It compiles the app, closes any instance I have open on the emulator, and then re-opens the OLD app, not the one with any new changes I made. Even if I close the app (double tap home and swipe up) then click the icon, is is still the old code.

If I don't have that app installed before, it works as expect (installs it newly and opens it).