We resolved this issue ourselves. The needed Splunk logs for each SolarWinds Alert can be found at $SPLUNK_HOME/var/log/splunk. When looking at the solarwinds_alerts log, we noticed that the initial_start_time was set to the future -- it was set to 2022-02-28T00:00:00.0 instead of 2022-01-28T00:00:00.0. We changed the initial_start_time to 2022-01-28T00:00:00.0 in the GUI, restarted splunk, and tested again. Still no alerts being generated. We then rebooted the server and the alerts were still not being generated after reboot. When we looked at the log file again it kept identifying the original incorrect initial_start_time in the log though it was displayed correctly with a time of 2022-01-28T00:00:00.0 in the GUI. Finally, we created a new alert with the correct initial_start_time of 2022-01-28T00:00:00.0 and everything worked. The original alert still does not work.
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