Affects both:

• true scope modifiers such as $global:
• namespace variable notation such as $function:

Steps to reproduce

Prerequisites:

• enable remoting on the calling machine
• run as admin.

# Define a variable and function, both named 'foo'.
function foo { 'func' }; $global:foo = 'var'
# Try to access these definitions remotely via $using
Invoke-Command -ComputerName . { $using:foo; $using:global:foo; $using:function:foo }

Expected behavior

var
var
 'func' 

Actual behavior

var

That is, $using:global:foo and $using:function:foo quietly evaluated to $null.

Environment data

PowerShell Core 6.2.0-rc.1
Windows PowerShell v5.1