why does a scriptblock passed as an argument in invoke-commands argumentlist fail?

Question

function test-scriptblock {
1..10 }
function caller ([scriptblock]$runthis) {
& $runthis
}

the following works fine.

caller -runthis ${function:test-scriptblock}

this doesn't work

invoke-command -ComputerName localhost -ScriptBlock ${function:caller} -ArgumentList ${function:test-scriptblock}

Cannot process argument transformation on parameter 'runthis'. Cannot convert the "
1..10 " value of type "System.String" to type "System.Management.Automation.ScriptBlock".
+ CategoryInfo          : InvalidData: (:) [], ParameterBindin...mationException
+ FullyQualifiedErrorId : ParameterArgumentTransformationError

Answer 1

I verified that this a "known issue". While in most cases in remoting scriptblocks regurgitate just fine as scriptblocks but with ArgumentList they don't, so instead I do

function Caller($runthis)
{
   $runthis = [Scriptblock]::Create($runthis)
   &$runthis
}