v27 and Enter-PSHostProcess

     _x64: 1
   _admin: 1
_elevated: 1

TCC  27.00.18 x64   Windows 10 [Version 10.0.19042.746]

In v26, I was able to, from a PowerShell session, enter the TCC PowerShell session, thus;
PS E:\utils> Enter-PSHostProcess -Name tcc
[Process:13108]: PS E:\Documents> get-runspace

 Id Name            ComputerName    Type          State         Availability
 -- ----            ------------    ----          -----         ------------
  1 Runspace1       localhost       Local         Opened        Available
  2 RemoteHost      localhost       Local         Opened        Busy

In v27, I get an error when I do this;
PS E:\utils> Enter-PSHostProcess -Name tcc
Enter-PSHostProcess : Cannot enter process tcc because it has not loaded the Windows PowerShell engine.
At line:1 char:1
+ Enter-PSHostProcess -Name tcc
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (Microsoft.Power...tProcessCommand:EnterPSHostProcessCommand)
    [Enter-PSHostProcess], PSInvalidOperationException
    + FullyQualifiedErrorId : EnterPSHostProcessNoPowerShell,Microsoft.PowerShell.Commands.EnterPSHostProcess

I know that PowerShell has been loaded in v27, as I can do;
e:\utils>pshell /s "date"

January 25, 2021 9:13:25 AM

What has changed between v26 and v27?

NOTE: The reason I do this is so I can debug the scripts/commands that I run in the TCC PowerShell session.