Hi @mayhew1955,
There is an bug in the core firmware, where it will stop listening for a particular event subscription. I believe this bug is fixed in the new photon firmware, and will be available to the core soon as we continue to upgrade our dev tools to target alternate firmware versions. There have been a few workarounds posted about the subscription issue on the forums, here’s one: Losing Spark.subscribe() connection/subscription
Thanks,
David