Why does the screenshot show all these blue dots? Those indicate that you’ve got unsaved changes. You’ll need to deploy those changes to make them active.
It seems to me that you only showed the path that works. However, to tell why the path from the ttn uplink up to the switch does not work like you expected, we’d need details about that path. Also, you’ll want to add many more msg nodes for debugging, activate those, and tell us what they show and what you expected, and for what payload of the uplink.
Aside: there’s no guarantee that you’ll be scheduling the downlink in time to be transmitted right after the uplink that triggers that very scheduling. Chances are that the scheduled downlink will be transmitted as a response to the next uplink. Also, beware of the maximum of 10 downlinks per day.