Using this addon inside of an engine causes Route to be reopened twice

[HeroicEric]

When this addon is used inside of an engine, it's initializer is run twice, once for the parent app and once for the engine. This results in all of the hooks being fired twice.

For example, the queryParamsDidChange hook will run twice every time a query param changes.

I can create a demo app if you'd like.

[offirgolan]

That makes sense. @HeroicEric I'll investigate further. PR is always welcome 😄