I fixed this by removing the plugin using cordova and adding it using grunt (I’m using ionic-generator for yeoman), not sure if it fixed some path problems or if it just updated the plugin, anyway, it’s working now 
About the splash screens, I manually renamed it, but when I build, the old ones are created again (without the @3x). When checking on xCode, the images are not there, not even the original ones (Default-736h.png).
I’ll follow @shashwattripath advice and report.