SYSTEMD_WANTS does not start the Dell iSM service when the idrac-usb-nic is enabled/disabled multiple times

Issue

• idrac Service Module (iSM) is a daemon service which is supposed to be started and running when the 'idrac' usb-nic interface is enabled from the idrac web-page.
• However, this is not happening when usb-nic is enabled/disabled multiple times from iDRAC web page.

$ cat /usr/lib/udev/rules.d/95-iSM-usbnic-systemd.rules

# Dell USBNIC Device
SUBSYSTEM=="usb", ATTR{idVendor}=="413c", ATTR{idProduct}=="a102", ATTR{manufacturer}=="Dell(TM)", ACTION=="add", RUN+="/bin/touch /opt/dell/srvadmin/iSM/etc/ini/usbnicconfig.ini"

SUBSYSTEM=="usb", ATTR{idVendor}=="413c", ATTR{idProduct}=="a102", ATTR{manufacturer}=="Dell(TM)", ACTION=="add", PROGRAM="/bin/systemctl is-enabled dcismeng.service", RESULT=="enabled", TAG+="systemd", ENV{SYSTEMD_WANTS}="dcismeng.service"

• Expectation is when usb-nic is enabled through iDRAC web page, dcismeng.service starts running. But currently, it does not start the dcismeng.service when we try enable/disable usb-nic multiple times.

• Working fine with RHEL7 but failing with RHEL8 onward