mate-screensaver --lock does not lock/block the displays of virtual monitors from xrandr

[SamDubYah]

Expected behavior

When running the mate-screensaver --lock all virtual monitors should be locked an display should not be shown.

Actual behavior

Only the primary display is being locked, the secondary virtual monitors are fully functioning

Steps to reproduce the behavior

Setup at least 2 xrandr virtual displays, one pointing to the actual display as follows:

xrandr --setmonitor DP-2-1 960/300x1080/340+0+0 none --rate 120.00
xrandr --setmonitor DP-2-3 960/300x1080/340+2880+0 none --rate 120.00
xrandr --setmonitor DP-2-2 1920/600x1080/340+960+0 DP-2 --rate 120.00

xrandr --fb 3841x1080
xrandr --fb 3840x1080

MATE general version

mate-screensaver-command 1.24.1

Package version

Version: 1.24.1-1

Linux Distribution

Parrot OS 4.11

Link to bugreport of your Distribution (requirement)