Question Setting Enum Property via Code Not Working in Build

I'm working on a URP Project and I'm using an enum property to allow for different "modes" of my shader. It works well in the editor, and I am able to switch between the values in c# using this function:

Code (CSharp):

1.  public static void SetViewMode(Material m, int mode)
2.         {
3.             m.DisableKeyword("_VIEWMODE_FINALOUTPUT");
4.             m.DisableKeyword("_VIEWMODE_SOURCE");
5.             m.DisableKeyword("_VIEWMODE_KEY");
6.             m.DisableKeyword("_VIEWMODE_LUMA");
7.             m.DisableKeyword("_VIEWMODE_ALPHA");
8.             m.DisableKeyword("_VIEWMODE_DESPILL");
9.  
10.             switch (mode)
11.             {
12.                 case 0:
13.                     m.EnableKeyword("_VIEWMODE_FINALOUTPUT");
14.                     break;
15.                 case 1:
16.                     m.EnableKeyword("_VIEWMODE_SOURCE");
17.                     break;
18.                 case 2:
19.                     m.EnableKeyword("_VIEWMODE_KEY");
20.                     break;
21.                 case 3:
22.                     m.EnableKeyword("_VIEWMODE_LUMA");
23.                     break;
24.                 case 4:
25.                     m.EnableKeyword("_VIEWMODE_ALPHA");
26.                     break;
27.                 case 5:
28.                     m.EnableKeyword("_VIEWMODE_DESPILL");
29.                     break;
30.             }
31.         }

But in builds, this function doesn't seem to do anything at all.

Is this a known issue?
Is there something I'm doing incorrectly?

This is the blackboard setup of the property:


Any help would be appreciated. Thanks!