This afternoon I removed all of my Hue bulbs and the Hue Control app, and added wgodfreyatl’s custom Hue Group control app found here: http://community.smartthings.com/t/philips-hue-groups-control-app/3455/15
Then I recreated my Hello, Home automations, and tested them. I was 9/10 with my tests, so I’m optimistic that triggered actions will be more reliable. I’ll report back if this solves my problem.
For context, I have 9 Hue bulbs in 6 groups. Not too many, and I read that the hue groups are limited to 16 which may or may not be an issue as I expand. My plan is to focus on smart switches where possible, and use smart bulbs only where I need the impact.