In Administration -> User Management -> Connections you see a lot of connection, with the "Remote Identifier" REST API, still active, although the users are disconnected since a while already.
This is a bug from in Automation Engine more precisely in JWP, who is in charge of the cleanup of timed out RES API connections.
Some REST API connections are not invalidated after the session timeout and are shown in system overview.
Release : 12.3
Component : AUTOMATION ENGINE
A workaround to bypass the problem, will consist regularly cleaning up the Connections from REST API connections in the Administration perspective
The correction of this bug is available in the following AE Service Packs:
Automation.Engine 21.0.0, -- Available
Automation.Engine 12.3.7 -- Available