The "Enabled" checkbox applies only when the app is running locally in modeler. On the deployment server, only what you specify in the yaml file will matter. https://world.mendix.com/display/howto40/Manage+scheduled+events
If your yaml file did say "ALL", do include a log statement at the beginning in your microflow, so that you'll really know whether it was triggered, or there was some other error in your microflow.