Fragment shader with "return" in for loop crashes the game on Android

Maybe someone can explain this phenomena?

This fragment shader makes the game hang and then crash on Anrdoid device.

 fixed4 frag(v2f_grab IN) : SV_Target
 {
     fixed4 color = tex2Dproj(_GrabTexture, IN.uvgrab);
 
     if (_HasNewColor == 1 && ColorsAreEqual(color, _NewColor))
     {
         return _NewColorState;
     }
 
     for (uint i = 0; i < _ColorsToShowLength; i++)
     {
         if (ColorsAreEqual(color, _ColorsToShow[i]))
         {
             return color;
         }
     }
 
     color = 1;
 
     return fixed4(1,1,1,1);
 }
 

The issue disappears if I replace "return" with "break".

 fixed4 frag(v2f_grab IN) : SV_Target
 {
     fixed4 color = tex2Dproj(_GrabTexture, IN.uvgrab);
 
     if (_HasNewColor == 1 && ColorsAreEqual(color, _NewColor))
     {
         return _NewColorState;
     }
 
     bool shouldShow = false;
     for (uint i = 0; i < _ColorsToShowLength; i++)
     {
         if (ColorsAreEqual(color, _ColorsToShow[i]))
         {
             shouldShow = true;
             break;
         }
     }
 
     if (!shouldShow)
     {
         color = 1;
     }
 
     return color;
 }