Chrome's support for packaged apps is under active development and rapidly evolving, so there are still a few rough edges. Here's a list of known issues in the current Chrome Canary:
{{+partials.known_issues}}If one of the above describes an issue you've run into, and you wish to be updated when it's resolved, click the star icon on the page header. Do not respond to the bug to say "me too" or ask "when will this be fixed?"; such updates can cause hundreds of emails to be sent. Add a comment only if you have information (such as a better test case or a suggested fix) that is likely to be helpful.
If none of the issues listed above describe what you're running into, you may wish to search the bug tracker, in case it has been reported but not marked as being known yet.
If you still can't find something that matches the problem you're having, you can report the bug on the Chromium bug tracker. Please include as many details as possible in your bug report, including Chrome version number, operating system, and any other relevant configuration details. Bug reports that attach a small app that exhibits the problem are especially appreciated.