In the Inventory tab, the metrics aren't displayed anymore. It seems that all devices metrics from the snmpcollector (pollagent) got lost from OC-UIM20.3.2 dashboard
But some metrics, such as net_connect/cdm are still visible.
There might have been a SnmpProxy network issue and suddenly stop polling information, or corruption in the snmpcollector Database.
The snpmcollector configuration ( so all the info for polling the devices) is stored in some H2 Database files located in : C:\Program Files (x86)\Nimsoft\probes\network\snmpcollector
So it is possible that the database got corrupt and this is compatible with it working again after wiping the DB files off.
Component : UNIFIED INFRASTRUCTURE MGMT
UIM 20.3.2. Hub 9.32HF2
OC 20.3.2, ump_dashboard_hf2