Most of my issues were related to bugs with 2D nodes such as Area2D. The engine as a quite a few non-breaking bugs related to differents aspects. It's still very usable and very high quality for an open source software. I'm looking for v4.0 to increase the stability.
I will probably write an article about my user experience with Godot compared to Unity or Game maker and others.
[1]: https://play.google.com/store/apps/details?id=com.loustak.in...