Ionic camera preview android toBack() issue

Hi there!

I’m having an issue with android: I’m recreating Josh’s tutorial for ‘ionic go’ and I’m having trouble dealing with android elements that I want to overlay on top.
The iOS version works really well, but it’s like the toBack cameraPreview options property doesn’t even work: the preview is overlaid on top of the html no matter what I try (even alerts are hidden underneath somehow).

Do you have any solutions please?