host.Start()启动后的host对象和从容器获取的IWorkflowHost对象不一样

[zengxiansheng]

Describe the bug
host.Start()启动后的host对象和从容器获取的IWorkflowHost对象不一样，从容器获取的IWorkflowHost对象无法启动工作流，提示工作流未注册。

`
//启动代码片段
var host = provider.GetService();
host.RegisterWorkflow<TestWorkflow, MyDataClass>();
host.Start();

  CommonUtitl.workflowHost = host;  //保存对象全局使用

`

string id = "TestWorkflow"; int version = 1; string workflowId = null; var def = _registry.GetDefinition(id, version); //结果：null var def2 = CommonUtitl.workflowHost.Registry.GetDefinition(id, version); //结果：有值 var tt = CommonUtitl.workflowHost == _workflowHost; //结果：不相等

To Reproduce

Expected behavior
从容器获取的IWorkflowHost对象和host.Start();后一样

Additional context
Add any other context about the problem here.