PowerShell modules are funny guys (II)

Here I'll focus on the irritating feature. The following script creates 2 modules in your user modul folder.
The second module imports the first module.

Import the first module, then the second. Both modules are imported.
Now remove the second module (that which imports the other too) and both are gone.

$modpath1 = ($env:PSModulepath -split ';')[0]            
mkdir $modpath1\submod -force            
mkdir $modpath1\testmod -force            
            
            
            
@'
$script:state_s = 0

function Get-State
{
    return $script:state_s
}

function Set-State ($x)
{
    $script:state_s = ($x)
}
'@ > "$modpath1\submod\submod.psm1"            
            
            
@'
Import-Module submod.psm1


function Get-StateY
{
    return Get-State
}

function Set-StateY ($x)
{
    Set-State $x
}
'@ > "$modpath1\testmod\testmod.psm1"            
            
ipmo submod            
ipmo testmod            
Write-host '------------'            
gmo            
Write-host '------------'            
rmo testmod            
gmo            

Do you agree, that is to be called a bug?

Bernd