On the contrary, I think that is a good sign. It means there is an active community that is opening and contributing to issues. If you check out Rails' repo (https://github.com/rails/rails) you'll see the same thing. If you've ever been an open source maintainer, you'll know that you'll inevitably write bugs and so you'll always have open issues. The scary thing would be if no one filed any issues or had any pull requests.
This is pretty normal. The community is creating enough issues/questions/possible improvements but the project can't possibly fix or incorporate all of them right away. Many of them are probably even bad, or just not the right approach. This stuff is hard and is something we've been dealing with at Ionic. No great solution yet, and I'm coming to terms with the fact that successful OSS projects have a high volume of issue and pr traffic.