Semitransparent shader not visible in front of objects

Question

Hey Guys,

im looking to get a Forcefield like effect with a Semitransparent Rim Shader. The shader in and of itself already looks aproximately how i want it to, i just have a problem where the Forcefield isnt visible when there is an Object behind it. It only correctly shows on the Object it encompasses and on the skybox.

Here are some screens:

http://prntscr.com/bng330

http://prntscr.com/bng2jm

http://prntscr.com/bng3cy

And here the Shader im using right now:

 Shader "Custom/Shield" {
     Properties {
         _MainTex ("Texture", 2D) = "white" {}
         _Cube ("Cubemap", CUBE) = "" {}
         _ReflColor ("Relection Color", Color) = (0.26,0.19,0.16,0.0)
         _RimColor ("Rim Color", Color) = (0.26,0.19,0.16,0.0)
         _RimPower ("Rim Power", Range(0.5,8.0)) = 3.0
         _AlphPower ("Alpha Rim Power", Range(0.0,8.0)) = 3.0
         _AlphaMin ("Alpha Minimum", Range(0.0,1.0)) = 0.5
 
     }
     SubShader {
         Tags { "RenderType" = "Transparent" }
 
         CGPROGRAM
         #pragma surface surf Lambert alpha
         struct Input {
             float2 uv_MainTex;
             float3 worldRefl;
             float3 viewDir;
             INTERNAL_DATA
         };
         
         sampler2D _MainTex;
         samplerCUBE _Cube;
         float4 _RimColor;
         float4 _ReflColor;
         float _RimPower;
         float _AlphPower;
         float _AlphaMin;
         
         void surf (Input IN, inout SurfaceOutput o) {
             o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb;
             half rim = 1.0 - saturate(dot (normalize(IN.viewDir), o.Normal));
             o.Emission = _RimColor.rgb * pow (rim, _RimPower) + texCUBE(_Cube, WorldReflectionVector (IN, o.Normal)).rgb*_ReflColor*2 ;
             o.Alpha = (pow (rim, _AlphPower)*(1-_AlphaMin))+_AlphaMin ;
         }
         ENDCG
     }
     Fallback "Diffuse"
 }

any help would be greatly appreciated!

Edit:

after playing around with it some more im now even more confused. The following pictures are of 3 cubes with the same standard shader. Depending on the Distance some Cubes work and others dont. There isnt a specific Range where they work or dont work either. The shield just flickers in and out of existance every step i take.

http://prntscr.com/bomvze

http://prntscr.com/bomwmp

http://prntscr.com/bomw9i

http://prntscr.com/bomww1