Hi!

The reasons are many, you can check the open issues to see the details, as posted by @Agustín-Pérez-Fernández :

There are a lot of issues open about this. I hope it gets fixed with the transition to openfl 5.

https://github.com/HaxeFlixel/flixel-addons/issues/4

https://github.com/HaxeFlixel/flixel-addons/issues/82

https://github.com/HaxeFlixel/flixel-addons/issues/222

https://github.com/HaxeFlixel/flixel-addons/issues/231

I tried the fixes and everything to make it work on CPP. While it did, the screenshots looked bad, really bad