Notifying activity on custom post type?

I’m trying to set up a Slack notification when a custom post type (CPT) is trashed or deleted from WP admin. I have successfully got alerts pushing through to my Slack channel when working with standard posts and pages, but not with my CPT.

Would you expect to see the CPT listed in the Context dropdown in the alert config? I’m not seeing any CPTs listed there, yet when I view the Stream logs I can see any CPT updates listed with the context of Posts->Properties – my CPT is named Properties.

Great plugin btw!