Some UIM Alarms are delayed in reaching Spectrum Alarm Notifier, or never make it to Spectrum at all.
Release : 20.2
Component : Spectrum Integrations
https://support.broadcom.com/download-center/solution-detail.html?aparNo=99111266&os=MULTI-PLATFORM
Another one that came up with this was 'SOH' or 'start of heading' this has a hex value of x01
The resulting spectrumgtw probe update for that including the above would be:
regExToRemoveMatchedChars = [\x01\x0B\x0C\x0D]