Even before the "Swap Device in apps" feature was out, I was having to swap old devices with new ones often. It became a chore to redo all the rules, or worse, the Alexa configurations, so I started doing something: I created a virtual device for every new real device, linked it with mirror me, and put all automations onto the virtual device. Even after the new swap feature, many of my devices are created by an app (like tasmota) or are children (home assistant integration), meaning I still use this technique.
My 1st question - is this detrimental to the hub or performance? In all, I saw ALL of my mirror me rules consume at max 1% of busy, but I'm wondering if there's something deeper.
2nd, I have been unable to do this for almost all dimmer switches (but bulbs are perfectly fine). What happens is that, when I change the brightness, the switch keeps on flickering between the brightness I set & one or two higher, resulting in a headache-inducing flickering of the light between two very close brightness levels. Is there an explanation for why this occurs in both zigbee, home assistant connected (tuya), and tasmota wall switches, but not lightbulbs?
Can you clarify if this is the built-in Mirror app, or a community based app. I think by the name it is the community app, in which case you should post in that thread, or tag the author of that app here.
You will want to post screenshots of logs that show this happening and list the specific brand and model of switch and brand and model of bulb. I would turn on Text logs for the bulb and switch before gathering logs. Also, it might be a good idea to post the gear menu for the problematic Mirror child app.
Once you do that, we can tag staff to look at this.
I solved it by using this app, which is faster & has a no-activity period built in (solved another issue my plugs had where they would get into an on/off loop with themselves).