Fan type error in logs keeps repeating, fan does work and is updated inside HomeKit.

[danielpetrovic]

[homebridge-mqttthing] This plugin threw an error from the characteristic 'On': Unhandled error thrown inside read handler for characteristic: This callback function has already been called by someone else; it can only be called one time.. See https://homebridge.io/w/JtMGR for more info.

Fan type error above in logs keeps repeating every time the values change, fan does work and is updated inside HomeKit. When I change the fan to be a AirPurifier, the error is gone. Same parameters/MQTT data/sources.

Config of one of the fans:

        {
            "type": "fan",
            "name": "DucoBox Ventilator",
            "topics": {
                "getRotationSpeed": "DUCO/Node1$.trgt"
            },
            "accessory": "mqttthing"
        },

Am I missing something in my config to fix this error?

[NickLplus]

I'm having exactly the same issue. But power does work when fed with true/false, { "type": "fan", "name": "Attic Exhaust Fan", "topics": { "getOn": "stat/AtticExhaustFan$.power" }, "accessory": "mqttthing" }