To help us better understand your setup and assist you effectively, could you please provide more details about your configuration:
The firmware version currently running on your router
Whether you are using I/O Juggler or Event Juggler
How the trigger interval is configured?
If possible, you may also share screenshots of your configuration. Please remember that this is a public forum, so make sure to blur or hide any personal information, such as phone numbers, before posting.
Have you tried configuring a trigger interval, for example, setting it to 5 seconds? In this case, the condition must remain met for the full 5 seconds before the SMS is triggered.
Please let me know whether this helps or if the issue persists.