HSM triggering in HomeKit during Intrusion Delay

Are you using this app? https://community.hubitat.com/t/release-homebridge-hubitat-v2-0/

If so, you might want to ask in that thread.

From a quick look at the bottom of this file (https://github.com/tonesto7/homebridge-hubitat-tonesto7/blob/master/src/HE_Transforms.js)
on GitHub, I don't think it currently accounts for delay statuses and would need to be changed by the app developer to alter the behavior you're seeing.