Yes this is a known bug and a lot of people have been experiencing this issue. Its at the top of our backlog.
To give a little more context on this issue. If I'm developing locally on chrome and then I open firefox without uninstalling my local app, on firefox it will fail to load my local app, but sadly it will also fail to load all my production apps as well.
You can typically determine this is your issue by looking in the console and seeing that a url with
filesystem:https failed to load.
Once again, this is a bug we are hoping to fix soon.