Hi Orlando,
You can using the rest api(http://ambari_server:8080/api/v1/hosts) to check are there any old hosts(not using in current cluster) but these hosts don't exist in VC. If yes, I it's an issue that it will hang in check hosts healthy on ambari server side. In this case, you need clean up the old hosts in ambari server first. And then I think it will work.