Just add zIndex : 1 to the view containing the buttons.
Also note: adding elevation adds shadow to android button and sometimes elevation may also be a issue if it’s added to parent and not added to child then the child button may not work (Rare Case).
eg:
buttonContainers:
{
zIndex: 1,
alignSelf: 'flex-end',
position: 'absolute',
top:5,
right: 5,
height: 40,
borderWidth: 1,
justifyContent: 'center',
alignContent: 'center',
width: 80
},