There are extra white spaces appended in the alarms from the "Disconnected Agent Manager Clients" rule which creates problems when alarms from Foglight Management Server (FMS) are forwarded to external tools.
This problem can be seen in multiple versions of FMS.
For now the extra white spaces can be manually deleted from the alarm message following the below steps.
Waiting for fix in a future release of Foglight Management Server.
Change request FGL-19473 has been fixed in the 5.9.3 and higher FMS versions.