Start-AzureRmVM cmdlet stuck in running state for hours

### Description

I'm trying to turn on a VM via PowerShell but I'm running into an odd issue. I'm using Start-AzureRmVm to start the machine. The command will run with no errors however even after the VM starts the cmdlet never finishes. It's almost like its waiting for a running status that never gets passed. I have to either stop the script using crtl+c or close the shell. While the command is running I can log into the Azure portal and verify that the machine is up and in a running state. I ran into this once before and deleted the VM and started over with a new VM. This worked for awhile but now the same issue is back. I can reproduce this issue on several machines, inside of a runbook, using a code editor like VS Code / ISE and even with the native shell. Has anyone seen this before? The VM is a build from the MS marketplace, I'm using one of the predefined Citrix Netscaler templates.

OSDiskName = netscalerosdisk
Publisher = citrix
Product = netscalervpx-120 (netscaler10standard)

I opened a case with Microsoft support but they said it's an issue with the cmdlet and I need to open a bug here.

### Script/Steps for Reproduction

I can reproduce the issue with the code below. The line Write-Output never runs and the text is never displayed. The shell is "stuck" waiting for the Start-AzureRmVM cmdlet to finish.

```powershell
[string] $sourceVM = 'vm9'
[string] $sourceResourceGroup = 'RG-Test-Production'

Write-Output "starting source vm $sourceVM"
Start-AzureRmVM -ResourceGroupName $sourceResourceGroup -Name $sourceVM
Write-Output "never writes this line..."

```

### Module Version

ModuleType Version Name ExportedCommands
---------- ------- ---- ----------------
Script 5.7.0 AzureRM

```powershell
Get-Module -Name AzureRM -ListAvailable
```

### Environment Data

Name Value
---- -----
PSVersion 5.1.16299.431
PSEdition Desktop
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
BuildVersion 10.0.16299.431
CLRVersion 4.0.30319.42000
WSManStackVersion 3.0
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1

```powershell
$PSVersionTable
```

### Debug Output

```

```