spring-cloud-consul: Register metadata failed by manual code in Spring Cloud Consul 2020

If I set metadata by code as follows:

       applicationContext.getBeanFactory().addBeanPostProcessor(new InstantiationAwareBeanPostProcessorAdapter() {
           @Override
           public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
               if (bean instanceof ConsulDiscoveryProperties) {
                   ConsulDiscoveryProperties consulDiscoveryProperties = (ConsulDiscoveryProperties) bean;
                   Map<String, String> metadata = consulDiscoveryProperties.getMetadata();
   	    metadata.put("spring.application.type", "service");
                   ...
               }
           }
       });

The exception will throw out, is it an issue?

discovery 2021-01-06 15:06:24,935 INFO [main] o.s.c.c.s.ConsulServiceRegistry [ConsulServiceRegistry.java:65] - Registering service with consul: NewService{id='discovery-springcloud-example-a-1100', name='discovery-springcloud-example-a', tags=[], address='172.27.208.1', meta={group=example-service-group, version=1.0, region=dev, env=env1, zone=zone1, spring.boot.version=2.4.1, spring.application.name=discovery-springcloud-example-a, spring.application.type=service, spring.application.uuid=1ed4354e-e4be-4b82-93fe-5fe47dbd3f18, spring.application.discovery.plugin=Consul, spring.application.discovery.version=7.0.0-SNAPSHOT, spring.application.discovery.agent.version=1.0.0, spring.application.register.control.enabled=true, spring.application.discovery.control.enabled=true, spring.application.config.rest.control.enabled=true, spring.application.group.key=group, spring.application.context-path=/, secure=false}, port=1100, enableTagOverride=null, check=Check{script='null', dockerContainerID='null', shell='null', interval='10s', ttl='null', http='http://172.27.208.1:5100/actuator/health', method='null', header={}, tcp='null', timeout='null', deregisterCriticalServiceAfter='null', tlsSkipVerify=null, status='null', grpc='null', grpcUseTLS=null}, checks=null}
discovery 2021-01-06 15:06:24,981 ERROR [main] o.s.c.c.s.ConsulServiceRegistry [ConsulServiceRegistry.java:76] - Error registering service with consul: NewService{id='discovery-springcloud-example-a-1100', name='discovery-springcloud-example-a', tags=[], address='172.27.208.1', meta={group=example-service-group, version=1.0, region=dev, env=env1, zone=zone1, spring.boot.version=2.4.1, spring.application.name=discovery-springcloud-example-a, spring.application.type=service, spring.application.uuid=1ed4354e-e4be-4b82-93fe-5fe47dbd3f18, spring.application.discovery.plugin=Consul, spring.application.discovery.version=7.0.0-SNAPSHOT, spring.application.discovery.agent.version=1.0.0, spring.application.register.control.enabled=true, spring.application.discovery.control.enabled=true, spring.application.config.rest.control.enabled=true, spring.application.group.key=group, spring.application.context-path=/, secure=false}, port=1100, enableTagOverride=null, check=Check{script='null', dockerContainerID='null', shell='null', interval='10s', ttl='null', http='http://172.27.208.1:5100/actuator/health', method='null', header={}, tcp='null', timeout='null', deregisterCriticalServiceAfter='null', tlsSkipVerify=null, status='null', grpc='null', grpcUseTLS=null}, checks=null}
com.ecwid.consul.v1.OperationException: OperationException(statusCode=400, statusMessage='Bad Request', statusContent='Invalid Service Meta: Couldn't load metadata pair ('spring.application.type', 'service'): Key contains invalid characters')
   at com.ecwid.consul.v1.agent.AgentConsulClient.agentServiceRegister(AgentConsulClient.java:278)
   at com.ecwid.consul.v1.ConsulClient.agentServiceRegister(ConsulClient.java:310)
   at org.springframework.cloud.consul.serviceregistry.ConsulServiceRegistry.register(ConsulServiceRegistry.java:67)
   at com.nepxion.discovery.plugin.registercenter.consul.decorator.ConsulServiceRegistryDecorator.register(ConsulServiceRegistryDecorator.java:48)
   at org.springframework.cloud.consul.serviceregistry.ConsulServiceRegistry.register(ConsulServiceRegistry.java:43)
   at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:232)
   at org.springframework.cloud.consul.serviceregistry.ConsulAutoServiceRegistration.register(ConsulAutoServiceRegistration.java:80)
   at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:133)
   at org.springframework.cloud.consul.serviceregistry.ConsulAutoServiceRegistration.start(ConsulAutoServiceRegistration.java:70)
   at org.springframework.cloud.consul.serviceregistry.ConsulAutoServiceRegistrationListener.onApplicationEvent(ConsulAutoServiceRegistrationListener.java:60)
   at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
   at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
   at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
   at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:426)
   at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383)
   at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:46)
   at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178)
   at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)
   at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)
   at java.lang.Iterable.forEach(Iterable.java:75)
   at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155)
   at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123)
   at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:940)
   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:591)
   at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:144)
   at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:767)
   at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759)
   at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:426)
   at org.springframework.boot.SpringApplication.run(SpringApplication.java:326)
   at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:144)
   at com.nepxion.discovery.plugin.example.service.DiscoveryApplicationA1.main(DiscoveryApplicationA1.java:33)

If that still use tags, works fine

List<String> tags = consulDiscoveryProperties.getTags();
tags.add("spring.application.type=service");
...