GLSL link error: Fragment info errors are thrown on restarting editor after switching Graphics APIs to OpenGLES3.

Steps to repro:
1. Create a new URP template project.
2. File > Build Settings > Player Settings > Other Settings.
3. Uncheck Auto Graphics API for Windows checkbox.
4. Add OpenGLES3 > Drag to the top of the list.
5. Restart the editor.

Actual Result:
GLSL link error: Fragment info errors in the console.

Expected Result:
No error in the console.

Reproducible in:
2020.2.0a19, 2020.2.0a11 with Package Version: 9.0.0 preview.33, 8.2.0, 8.1.0.

Working Fine in:
2020.2.0a10, 2020.1.0f1 with Package Version: 9.0.0 preview.33, 8.2.0, 8.1.0.

Environment:
Occurring only on Windows.

Stacktrace:
-------- GLSL link error: Fragment info
-------------
(0) : error C6020: Constant register limit exceeded at _MainLightPosition; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _MainLightColor; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _AdditionalLightsCount; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _TimeParameters; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at unity_FogColor; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _CascadeShadowSplitSpheres0; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _CascadeShadowSplitSpheres1; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _CascadeShadowSplitSpheres2; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _CascadeShadowSplitSpheres3; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _CascadeShadowSplitSphereRadii; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _MainLightShadowParams; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _MainLightShadowmapSize; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _AdditionalShadowmapSize; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at unity_SpecCube0; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at hlslcc_zcmp_MainLightShadowmapTexture; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at hlslcc_zcmp_AdditionalLightsShadowmapTexture; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at Texture2D_C69EB180; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _SampleTexture2D_C873BFA4_Texture_1; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _SampleTexture2D_CDBC38BA_Texture_1; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _SampleTexture2D_D6BD25ED_Texture_1; more than 1024 registers needed to compile program
(0) : error C6020: Constant register limit exceeded at _SampleTexture2D_72715EE4_Texture_1; more than 1024 registers needed to compile prog