Robocopy behaves differently when running directly or from powershell script - powershell

Question

I have a script that copies a file from a network location to a local folder using robocopy.
When I run following powershell 7 script from Visual Code, or execute the command directly in PS, only 1 file is copied as intended. If a run the script in powershell 4 files are copied. How can I copy the single file running from the script.
$dbname = "domoticz.db"
$sourcedir="\\ix2\PiBackup\domoticz\"
$targetdir="C:\tmp\DomoticzScripts\"
$dbfile = $targetdir + $dbname
robocopy $sourcedir $targetdir $db -njh
Output running it directly or VS Code debugger
New Dir 1 \\ix2\PiBackup\domoticz\
100% New File 8.9 m domoticz.db
------------------------------------------------------------------------------
Total Copied Skipped Mismatch FAILED Extras
Dirs : 1 1 0 0 0 0
Files : 1 1 0 0 0 0
Bytes : 8.96 m 8.96 m 0 0 0 0
Times : 0:00:00 0:00:00 0:00:00 0:00:00
Speed : 70709894 Bytes/sec.
Speed : 4046.052 MegaBytes/min.
Ended : zaterdag 30 mei 2020 11:45:40
Running it in a script
New Dir 4 \\ix2\PiBackup\domoticz\
100% New File 8.9 m domoticz.db
100% New File 32768 domoticz.db-shm
100% New File 0 domoticz.db-wal
100% New File 9.0 m domoticz_.db
------------------------------------------------------------------------------
Total Copied Skipped Mismatch FAILED Extras
Dirs : 1 1 0 0 0 0
Files : 4 4 0 0 0 0
Bytes : 18.05 m 18.05 m 0 0 0 0
Times : 0:00:00 0:00:00 0:00:00 0:00:00
Speed : 75125841 Bytes/sec.
Speed : 4298.735 MegaBytes/min.
Ended : zaterdag 30 mei 2020 11:47:06