If material has array property and that is modified during runtime, particles do not reflect the change

[zephyo]

To Reproduce
Steps to reproduce the behavior:

1. Have shader have array property.
2. Assign shader to material then assign material to UIParticle particle system
3. Call material.SetColorArray on the material, or some other Set___Array call
4. Watch the changes reflected in any renderer referencing the material (e.g. Image, etc) other than the UIParticle

I have tried adding the name of the property to Animatable properties but it doesn't work because array isn't a valid case in AnimatableProperty.UpdateMaterialProperties function.

See below for my shader code which posterizes input into 4 colors:

Shader "UI/4Color"
{
    Properties
    {
        [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
        _Color ("Tint", Color) = (1,1,1,1)

        [Enum(UnityEngine.Rendering.CompareFunction)] _StencilComp ("Stencil Comparison", Float) = 8
        _Stencil ("Stencil ID", Float) = 0
        [Enum(UnityEngine.Rendering.StencilOp)] _StencilOp ("Stencil Operation", Float) = 0
        _StencilWriteMask ("Stencil Write Mask", Float) = 255
        _StencilReadMask ("Stencil Read Mask", Float) = 255

        _ColorMask ("Color Mask", Float) = 15

        // [Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
        _AlphaClip("_AlphaClip", Range(0, 1)) = 0.001

        // BLENDING MODE
        [Enum(UnityEngine.Rendering.BlendMode)] _SrcMode ("SrcMode", Float) = 5
        [Enum(UnityEngine.Rendering.BlendMode)] _DstMode ("DstMode", Float) = 10
        [Enum(UnityEngine.Rendering.BlendOp)] _BlendOp ("BlendOp", Float) = 0
    }

    HLSLINCLUDE
    #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
    ENDHLSL

    SubShader
    {
        Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" "CanUseSpriteAtlas"="True" }

        Stencil
        {
            Ref [_Stencil]
            Comp [_StencilComp]
            Pass [_StencilOp]
            ReadMask [_StencilReadMask]
            WriteMask [_StencilWriteMask]
        }

        Cull Off
        Lighting Off
        ZWrite Off
        ZTest [unity_GUIZTestMode]
        // Blend One OneMinusSrcAlpha
        ColorMask [_ColorMask]
        Blend [_SrcMode] [_DstMode]
        BlendOp [_BlendOp]

        Pass
        {
            HLSLPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            #pragma multi_compile_local _ UNITY_UI_CLIP_RECT
            // #pragma multi_compile_local _ UNITY_UI_ALPHACLIP
            #pragma shader_feature CALCULATE_IN_VERT
            #pragma shader_feature USE_DITHER

            struct appdata_t
            {
                float4 vertex   : POSITION;
                float4 color    : COLOR;
                float2 texcoord : TEXCOORD0;
                UNITY_VERTEX_INPUT_INSTANCE_ID
            };

            struct v2f
            {
                float4 vertex   : SV_POSITION;
                half4 color    : COLOR;
                float2 texcoord  : TEXCOORD0;
                float4 worldPosition : TEXCOORD1;
                float4 screenPos  : TEXCOORD2;
                float4  mask : TEXCOORD3;
                UNITY_VERTEX_OUTPUT_STEREO
            };

            TEXTURE2D(_MainTex);
            SAMPLER(sampler_MainTex);
            half4 _MainTex_ST;
            half4 _Color;

            half4 _TextureSampleAdd;
            float4 _ClipRect;
            float _UIMaskSoftnessX;
            float _UIMaskSoftnessY;
            int _UIVertexColorAlwaysGammaSpace;

            float _AlphaClip;

            #define LENGTH 4
            float4 _Color2[LENGTH];

            v2f vert(appdata_t v)
            {
                v2f OUT;
                UNITY_SETUP_INSTANCE_ID(v);
                UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
                float4 vPosition = TransformObjectToHClip(v.vertex);
                OUT.worldPosition = v.vertex;
                OUT.vertex = vPosition;
                OUT.screenPos = ComputeScreenPos(OUT.vertex);

                float2 pixelSize = vPosition.w;
                pixelSize /= float2(1, 1) * abs(mul((float2x2)UNITY_MATRIX_P, _ScreenParams.xy));

                float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);
                OUT.texcoord = TRANSFORM_TEX(v.texcoord.xy, _MainTex);
                OUT.mask = float4(v.vertex.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_UIMaskSoftnessX, _UIMaskSoftnessY) + abs(pixelSize.xy)));

                OUT.color = v.color * _Color;
                return OUT;
            }

            half4 frag(v2f IN) : SV_Target
            {
                //Round up the alpha color coming from the interpolator (to 1.0/256.0 steps)
                //The incoming alpha could have numerical instability, which makes it very sensible to
                //HDR color transparency blend, when it blends with the world's texture.
                const half alphaPrecision = half(0xff);
                const half invAlphaPrecision = half(1.0/alphaPrecision);
                IN.color.a = round(IN.color.a * alphaPrecision)*invAlphaPrecision;

                half4 color = IN.color * (SAMPLE_TEXTURE2D(_MainTex, sampler_MainTex, IN.texcoord) + _TextureSampleAdd);

                #ifdef UNITY_UI_CLIP_RECT
                    half2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(IN.mask.xy)) * IN.mask.zw);
                    color.a *= m.x * m.y;
                #endif

                // #ifdef UNITY_UI_ALPHACLIP
                clip (color.a - _AlphaClip);
                // #endif

                color.rgb = _Color2[floor(color.r*LENGTH-0.01)].rgb;

                return color;
            }
            ENDHLSL
        }
    }
}