Spectrumgtw's alarm syncing was not working and has worked previously. No changes to spectrumgtw configuration were made.
While investigating we've noticed that the Trellis probe was in a failed state.
Trellis is used in the integration with with Spectrumgtw. If it is in a failed state than the Spectrumgtw-service will not work.
Release: CNMSPP99000-8.47-Unified Infrastructure Mgmt-Server Pack-- On Prem
Cold starting the trellis probe resolved the issue.