Slack Notifications are Duplicated on Channel

[stevereiss]

Jenkins and plugins versions report

Environment

Jenkins Version 2.414.3
Slack Notification Plugin Version 684.v833089650554
Test Results Analyzer Plugin Version 0.4.0

What Operating System are you using (both controller, and any agents involved in the problem)?

Windows Server 2019 Bld 1809

Reproduction steps

Our Windows Jenkins system has been working fine for over a year with the Slack Notifications - sending around 10 - 12 messages to 2 different channels.

After updates in Late October, the notifications using Python Scripts with Test Results Analyzer Plugin are duplicated with the current build number (correct) then a duplicate notification of an older build (build no longer in the system - retention of 15 builds).

Note : If I run a job manually - the duplication does not happen. The above Python jobs are on a chron jobs for daily runs.

This notification duplication does NOT happen when jobs from the Robot Framework plugin are run.

Expected Results

Expecting to see a single Slack Notification per job run

Actual Results

Double notifications for Python jobs using Test Results Analyzer Plugin and Chron settings.

Anything else?

No response