Generated Shaders Violate OGLES 3.2 standard

The generated fragment shader for a custom materials contains unused output variables which causes errors during compilation.

//Shader name custom material pipeline- qrc:/shaders/globe.frag;hasLighting=true;lightCount=0;specularModel=Default;;diffuseMap={;;;;;};diffuseMap_swizzle={;;;;};emissiveMap={;;;;;};emissiveMap_swizzle={;;;;};specularMap={;;;;;};specularMap_swizzle={;;;;};opacityMap={;;;;;};opacityMap_swizzle={;;;;};bumpMap={;;;;;};bumpMap_swizzle={;;;;};specularAmountMap={;;;;;};specularAmountMap_swizzle={;;;;};normalMap={;;;;;};normalMap_swizzle={;;;;};displacementMap={;;;;;};displacementMap_swizzle={;;;;};translucencyMap={;;;;;};translucencyMap_swizzle={;;;;};lightmapIndirect={;;;;;};lightmapIndirect_swizzle={;;;;};lightmapRadiosity={;;;;;};lightmapRadiosity_swizzle={;;;;};lightmapShadow={;;;;;};lightmapShadow_swizzle={;;;;};roughnessMap={;;;;;};roughnessMap_swizzle={;;;;};baseColorMap={;;;;;};baseColorMap_swizzle={;;;;};metalnessMap={;;;;;};metalnessMap_swizzle={;;;;};occlusionMap={;;;;;};occlusionMap_swizzle={;;;;};tessellationMode={noTessellation=true;;;};alphaMode=Opaque;

The issues is the same as in https://bugreports.qt.io/browse/QT3DS-3173.