No matter what I do, exporting a project from 4.x doesn't seem to want to work on Android. I've tried exporting my game project, and exporting a new, nearly-blank project with only a sprite in the middle of the screen. The result is always the same: the Godot splash shows, then there's a black screen.
I've tested on my mobile and on my Retroid Pocket 2+. On my mobile, the black screen persists until I close the game. On the Retroid, it always crashes after about two seconds of black screen.
I can export Godot 3.x games onto these devices without issue.
I've tried changing the rendering method between mobile and gl_compatibility. I've tried different scaling modes. In the export settings, I've made sure both ARM architecture libraries - v7 and v8 - are included. Still, the same result in every case.
Has anyone gotten their 4.x games running on Android? Is there something I'm missing? Or is 4.x just not compatible with many Android devices in its current state?