@WithSpan not working with Springboot

Describe the bug Following the documentation’s instructions: https://opentelemetry.io/docs/instrumentation/java/automatic/annotations/, I set up javaagent and was able to get span successfully, but when I use @WithSpan, no span is created

Steps to reproduce

• Init a very simple springboot 2.7.3 application dependencies in pom.xml:

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    ...
    
    <dependency>
        <groupId>io.opentelemetry.instrumentation</groupId>
        <artifactId>opentelemetry-instrumentation-annotations</artifactId>
        <version>1.17.0-alpha</version>
    </dependency>
</dependencies>

DemoController.java:

package com.example.demo.controller;

import com.example.demo.entity.GeneralResult;
import com.example.demo.service.DemoService;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("demo")
public class DemoController {
    @Resource
    DemoService demoService;

    @GetMapping("/get")
    public GeneralResult getDemo() {
        Map<String, Object> map = new HashMap<>();
        map.put("randomInt", demoService.randomInt(System.currentTimeMillis()));
        return GeneralResult.success(map);
    }
}

DemoService:

package com.example.demo.service;

import io.opentelemetry.instrumentation.annotations.SpanAttribute;
import io.opentelemetry.instrumentation.annotations.WithSpan;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.util.Random;

@Service
@Slf4j
public class DemoService {
    @WithSpan
    public Integer randomInt(@SpanAttribute long seed) {
        return new Random(seed).nextInt();
    }
}

• Config Environment and javaagent in Intellj Idea

env: OTEL_METRICS_EXPORTER=none;OTEL_SERVICE_NAME=java-demo;OTEL_TRACES_EXPORTER=otlp
vm options: -javaagent:lib/opentelemetry-javaagent.jar

• Start the application and then request the demo/get, and successfully collect two spans, named /demo/get and DemoController.getDemo, but missing the expected DemoService.randomInt

What did you expect to see? successfully collect /demo/get , DemoController.getDemo and DemoService.randomInt and any method with @WithSpan

What did you see instead? @WithSpan not working propertly, missing the expected span DemoService.randomInt

What version are you using?

<dependency>
    <groupId>io.opentelemetry.instrumentation</groupId>
    <artifactId>opentelemetry-instrumentation-annotations</artifactId>
    <version>1.17.0-alpha</version>
</dependency>

Environment Compiler: Eclipse Adoptium\jdk-8.0.342.7-hotspot OS: Windows10