I have tried to run the script using command
cmd.exe /c Start /min powershell.exe -windowstyle hidden -file <file>.ps1
But getting a CMD window for a fraction of a second. I need it to run completely hidden.
I have had this issue and the only way I could fix it was to call the PowerShell script with a simple VBS wrapper:
https://github.com/gbuktenica/PsRun
' SYNOPSIS
' Run a PowerShell script in the user context without a script window
' EXAMPLE
' wscript.exe PsRun.vbs MyPsScript.ps1
' AUTHOR
' Glen Buktenica
Set objShell = CreateObject("Wscript.Shell")
Set args = Wscript.Arguments
For Each arg In args
Dim PSRun
PSRun = "powershell.exe -WindowStyle hidden -ExecutionPolicy bypass -NonInteractive -File " & arg
objShell.Run(PSRun),0