You have configured log alarms. This runs for every 5 minutes.
It capture message in the log about application start (POD start),
If successful, it generates log alarm in the OI.
This OI log alarm triggers Google Chat notification.
The issue here is that OI alarm is getting updated every 5 minutes and it is triggering Google Chat notification every 5 minutes.
The purpose is to just notify once for every application start (POD start) message in the log.
DX SAAS
OI Engineering/DEV team already have a fix for this issue. The fix will be released in DX SAAS production environment in coming days.