Android Touch Input works perfectly on Samsung Galaxy S3 but breaks on Galaxy S4

Hey Guys,

I've got a game which has simple touch input which works perfectly on my Samsung Galaxy S3, but when I load the exact same APK onto a Galaxy S4, the touch input not longer registers touch movement (required for aiming) but still fires on touch release.

Any ideas to help fix the issue would be most appreciated.

Touch works fine with Unity Editor

Touch works fine with Unity Remote on Galaxy S4

Regards

Andrew

To be clear, the weapon draws and fires fine, it's the aiming which works on S3 but not S4. This code also worked fine on the S4 in earlier builds. Code as requested:

 //If the weapon can be fired, calls the Draw function to aim before 
 //Releasing the weapon.
 
 if (!_hasFired && !_hasDrawn && !_mySceneManager.UIButtonClicked && ((Arrow != null && !Arrow.IsActive) || isOilPot))
             {
                 if (!isOilPot && !isMultiArrow) Arrow.IsActive = true;
                 StartCoroutine("Draw");
             }
 
 //Aims using input from the touch zones defined in SceneManager
 IEnumerator Draw()
     {
         _hasDrawn = true;
         if (WeaponAmmo != null) WeaponAmmo.SetActive(false);
         if (BowAnimator != null && HasDraw) BowAnimator.Play("Draw");
 
         while (_mySceneManager.UIFiring)
         {
             float deltaZ = 0.0f;
             if (_myGameManager != null && TouchScript != null) { deltaZ = TouchScript.GetDirection() * mouseSensitivity * _myGameManager.InvertTurretModifier; } else Debug.Log("TouchScript is null"); 
             angleOffset += deltaZ;
             angleOffset = Mathf.Clamp(angleOffset, -rotateAmount, rotateAmount);
             eulers.z = Mathf.Lerp(eulers.z, initialZ + angleOffset, Time.deltaTime * (1.0f / lag));
 
             transform.eulerAngles = eulers;
             yield return null;
         }
         if (_hasDrawn && !_mySceneManager.UIFiring)
         {
             StartCoroutine("Fire");
         }
         yield return null;
     }