Layer keeps re-drawing and there is no way to stop it

[PROBERT68]

Hi friends,

I have a layer that has the contour and the field name is FCode and I had to clip it from the orignal layer due to very large data cover our country in USA. So, when I clipped it to our extent area. I checked for it's symbology and had to remove the Zeros. The Attributes shows me it has 433,710.  The legend shows it has four different Labels.

P.S. I forgot to add this.  When it re-draws, the layer looks flicking a lot..

I had to cancel drawing or Paused it  

What is the solution to force it to stop keeping drawing ?  I have disabled caches for that layer