Maintenance Mode scheduled is being deleted by the spectrumgtw probe.
CA Spectrum 10.2.3 + Spectrum_10.02.03.BMP_10.2.301 and CA UIM 8.51 SP1 + spectrumgtw 8.65 HF4
Spectrumgtw probe is trying to get schedules from maintenance_mode probe, but it is stopped. This is causing and not getting schedules from CA UIM. As a result, spectrumgtw probe is removing schedules from CA Spectrum as thinking schedules are deleted in CA UIM
Contact CA Support and request the spectrumgtw-8.6.5-HF5.zip file and deploy it.