Fortisiem Windows agent status showing as disconnected in CMDB

Environment Details:
Supervisor Version: 7.1.3 (MSP environment)
Windows Agent Version: 7.1.11 (also tested with 7.1.1)

HTTPS Proxy Configuration: Applied on Collector

Issue Summary:
Out of 5 Windows agents, 2 are showing "Running - Active" status, while the remaining 3 are showing "Disconnected" status on the Supervisor console.

Troubleshooting Performed:
Followed steps from the Fortinet Community article:
Windows Agent Registration with Supervisor.

Verified that HTTPS proxy configuration on the collector is correct (since 2 agents are successfully connected).

Test connection to the collector from affected agents is successful.

Upon reviewing the trace logs, it was observed that the agent is attempting to connect directly to the Supervisor, instead of using the collector.

Confirmed that Supervisor address field is blank under:
Admin -> Settings -> System -> Cluster Config -> Supervisors (This was already cleared as part of previous troubleshooting steps for a similar issue.)

Checked cat /var/log/httpd/ssl_access_log on collector and getting below error
10.11.125.5 - - [10/Jul/2025:06:06:09 -0500] "PUT /phoenix/rest/windowsAgent/update HTTP/1.0" 401 998
10.10.3.13 - 201353 [10/Jul/2025:06:06:13 -0500] "POST /winupload_direct?201353 HTTP/1.0" 200 -

Request:
Need assistance in identifying why the agent is bypassing the collector and attempting direct Supervisor communication, despite the setup being correct.