Monitoring via ping only, false positive in Manage plugin, old Cacti, looking for patch

Dear list,

please help me understand what is wrong with our older installation - Cacti
0.8.7g. We can monitor few backup wirewalls only by ping, so I disabled
SNMP options and Cacti is doing only TCP ping to the device. Surely this
works and they are green in Cacti console, howewer our SPOC team is using
the Manage plugin view where all thoose firewalls looks down. So no way to
detect when device is not responding to pings since it looks like down all
the time.

While searching where the problem can be I installed newer version of
Manage plugin to Cacti 0.8.8a and detected the behaviour is normal there,
devices monitored by ping only are green and looks up in Manage plugin
view. Is this some well known bug fixed in never versions so probably I can
find a patch even for my old intallation? We are not allowed to upgrade
this Cacti. Two screenshots attached for better understanding.

Please share your opinion

Regards

Fblubr

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