PowerShell Event Registration: Action block executes multiple times

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PowerShell

WMI

Problem: every time USB is plugged in, code inside -Action{} runs 6-7 times
Desired: I want to handle it only once when event is raised.

Example:
$query = "SELECT * FROM Win32_DeviceChangeEvent WHERE EventType = 2"
Register-WMIEvent -Query $query -Action {Write-Host "USB Plugged In"} -SourceIdentifier "PluggedIn"

In this case I will get "USB Plugged In" written 6 times when I plug 1 usb once. Not sure why, but every time the event is raised multiple times. At least this is the case for USB. I want to respond to usb plug in event with 1 action and do it 1 time, not 6 times. Need help, thanks.