Javascript Splice is splicing remained values when looping

Question

var array = [
    ["0","1","2","3","4","5"],
    ["0","1","2","3","4","5"]
];
 
angular.forEach(array, function(nestedArray){ 
    angular.forEach(nextedArray, function(value){
        console.log(value);
        nextedArray.splice(0,3);
    });
});
console.log(count);
  

Desired output

0,1,2,3,4,5,0,1,2,3,4,5

But I am getting output of

0,1,2,0,1,2

Each inside array has 6 values, when I loop the inside array, I cut 3 items, then I expect to loop again as there are 3 items remained but it just gets out of the loop. When I add 7 items in each array, it's looping after removing 3 items. When I debug the code, after splicing from index 0,1,2 then I still have '3,4,5' to loop 3 times more in the nested loop right?