I am using SmartThings Hub primarily for a new installation of 100+ Fibaro light switches (dimmers and non-dimmers) in my house. I did some initial testing of a few Fibaro switches, which seemed to work fine.
My next milestone was to install an entire room (Guest House) with about a dozen Fibaro switches.
They all work fine individually, and can be invoked from the physical switch or remotely via the SmartThings App (using Classis App), Alexa, etc.
They do, however, exhibit intermittent delays in reporting their status to the app. Sometimes it is immediate, while other times it takes anywhere from 10 seconds to a minute.
My next step was to test some Scenes and Automations. For example, I would create a Scene that turned on (or off) multiple Fibaro switches. I would then create an Automation that invoked such a Scene when the physical Fibaro switch was turned on or off (eg, press one light switch, which causes 2 or 3 circuits to turn on).
This is where I experienced an unusual amount of delay (and often partial failure - eg, only 2 of 4 switches would turn on).
I was surprised that the Scenes in the SmartThings app (which invoke multiple devices) seem to work significantly more slowly than the individual switches themselves. For example, I can tell Alexa to turn on a Fibaro switch, or invoke the Fibaro swtich remotely from the SmartThings app, with little delay, And I can turn on the physical switch and see it reported in the SmartThings app with relatively little delay.
But when I invoke a Scene from the SmartThings app (or an Automation triggered by the operation of a physical swtich) which invokes multiple switches, then I get significantly more delay, and often a partial failure. If I wait 15 seconds and reinvoke the Scene, it might invoke some of the switches it missed the first time, though even this is not terribly reliable.
Does the SmartThings app have a general problem with Scenes that invoke multiple devices (eg, 3-10 at a time)? Is this likely a SmartThings problem, or perhaps a Fibaro problem?
I still need to do more troubleshooting to narrow this down (and hopefully find a solution), but appreciate any thoughts – especially from someone who has used Fibaro light switches with the SmartThings Hub.