Hi,  
1.Kindly confirm if you are logging in with domain admin account to the server with RDCB role.  
2.What if trying to add other servers into the RDCB server management pool again? If there is any issues, kindly share the details.
3.Steps instructed to check if WID was working well.
- Open PowerShell, and type “get-windowsfeature” with enter.
- Check the cmdlet result and confirm that if Windows Internal Database has been installed.
If WID(Windows Internal Database) has been installed:
- Open Run, type “services.msc” and end with enter.
- Find service Windows Internal Database, open its Properties – Log On, make sure it has been configured with “Local system account”.
- Save the change and re-start the service, try to install RD CB again.
If problem persists, please try:
- Uninstall the Windows Internal Database.
- Rename the old WID (C:\Windows) to WID_old.
- Try to install RDCB again to check the result.
4.Is there any other problem behavior when users started the remote session to the servers after RE-IP?
Hope this helps and please help to accept as Answer if the response is useful.
Thanks,  
Jenny