Missing Harmony Remote DIM function after upgrade [solved]

Configuration
1

I’ve got four lights exposed to Harmony via emulated hue which works a treat. Two of the lights are Shelly dimmers so they can be dimmed used the rocker on the Harmony remote after turning them on. Oddly, the dimmer in the lounge stopped being controllable via the Harmony remote after I upgraded to 2022.3.0.

This is about the 4th time this has happened to me and it’s always the same light; the lounger dimmer. I can still dim the other Shelly in the kitchen when this problem occurs. Oddly, I can still dim the light via the wall switch, the HA GUI, Alexa, Google and the Harmony app by selecting devices so I know the light is not the issue.

Stupidly, last time I fixed it I forgot to document the approach but from memory I ended up removing and reinstalling the Harmony integration and it came back; sadly, not this time.

Anyone else seen this behaviour or know how I’d debug it? Drives the wife nuts when this stops working as we use it every night.

harmony-remote-product-photos02
harmony-remote-product-photos02768×432 203 KB

2

If it helps, here is the result of the API scan

	
1	
state	
on	true
reachable	true
mode	"homeautomation"
bri	254
name	"Bottle Lights"
uniqueid	"00:85:91:36:e2:f3:71:4c-09"
manufacturername	"Home Assistant"
swversion	"123"
type	"Dimmable light"
modelid	"HASS123"
2	
state	
on	false
reachable	true
mode	"homeautomation"
bri	254
name	"Pool Floodlight"
uniqueid	"00:50:bb:00:7f:1c:7b:f8-7e"
manufacturername	"Home Assistant"
swversion	"123"
type	"Dimmable light"
modelid	"HASS123"
3	
state	
on	true
reachable	true
mode	"homeautomation"
bri	99
name	"Lounge Light"
uniqueid	"00:1e:e2:f2:80:cb:d9:59-50"
manufacturername	"Home Assistant"
swversion	"123"
type	"Dimmable light"
modelid	"HASS123"
4	
state	
on	true
reachable	true
mode	"homeautomation"
bri	254
name	"Kitchen Light"
uniqueid	"00:8b:56:37:2d:50:13:84-82"
manufacturername	"Home Assistant"
swversion	"123"
type	"Dimmable light"
modelid	"HASS123"
3

Turns out this was related to a Harmony bug fixed 29th March firmware (4.15.307) Release Notes

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