问JsonSerializer在System.Text.Json中不能用StringEnumConverter处理某些字符

EN

using System;
using System.Runtime.Serialization;
using System.Text.Json;
using System.Text.Json.Serialization;

public class Program {
    public enum Operator {
        [EnumMember(Value = "<=")] LessOrEqual,
        [EnumMember(Value = "lesseq")] LessEq,
    }

    public class BasicJson { 
            public Operator Operator {get; init;}
    }

    public static void Main() {
        JsonSerializerOptions SerializationOptions = new() {
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
        IgnoreNullValues = true,
        Converters = {
                new JsonStringEnumConverter()
            },

    };
        var serialized = JsonSerializer.Deserialize<BasicJson>("{\"operator\": \"<=\"}", SerializationOptions);
        Console.Write($"{serialized.Operator}");

    }

}

Unhandled exception. System.Text.Json.JsonException: The JSON value could not be converted to Program+Operator. Path: $.operator | LineNumber: 0 | BytePositionInLine: 17.
   at System.Text.Json.ThrowHelper.ThrowJsonException(String message)
   at System.Text.Json.Serialization.Converters.EnumConverter`1.ReadAsPropertyNameCore(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Converters.EnumConverter`1.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 utf8Json, JsonTypeInfo jsonTypeInfo, Nullable`1 actualByteCount)
   at System.Text.Json.JsonSerializer.ReadFromSpan[TValue](ReadOnlySpan`1 json, JsonTypeInfo jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)
   at Program.Main()

    Converters = {
                new  Macross.Json.Extensions.JsonStringEnumMemberConverter(),
                new JsonStringEnumConverter()
            },