Changing granularity of BT also changes target temperature

TRV Model: 2 x Spirit Eurotronics Thermostatic Valve https://devices.zwave-js.io/?jumpTo=0x0148:0x0003:0x0001:0.0
Integration of TRV: Z-Wave JS
Output from Home Assistant Developer Tools state e.g.: heat

Output from Home Assistant Device Diagnostic from BT

{
{
"home_assistant": {
"installation_type": "Home Assistant Supervised",
"version": "2024.1.2",
"dev": false,
"hassio": true,
"virtualenv": false,
"python_version": "3.11.6",
"docker": true,
"arch": "x86_64",
"timezone": "Europe/Berlin",
"os_name": "Linux",
"os_version": "6.5.6-arch2-1",
"supervisor": "2023.12.0",
"host_os": "Arch Linux",
"docker_version": "24.0.6",
"chassis": "vm",
"run_as_root": true
},
"custom_components": {
"waste_collection_schedule": {
  "version": "1.44.0",
  "requirements": [
    "icalendar",
    "recurring_ical_events",
    "icalevents",
    "bs4",
    "lxml"
  ]
},
"battery_sim": {
  "version": "1.0",
  "requirements": []
},
"eufy_security": {
  "version": "8.0.1",
  "requirements": [
    "websocket-client==1.4.2",
    "aiortsp==1.3.7"
  ]
},
"google_home": {
  "version": "1.11.0",
  "requirements": [
    "glocaltokens==0.7.0"
  ]
},
"grad_vol": {
  "version": "1.0.0",
  "requirements": []
},
"google_fit": {
  "version": "v3.1.0",
  "requirements": [
    "oauth2client==4.1.3",
    "google-api-python-client==2.82.0"
  ]
},
"hacs": {
  "version": "1.33.0",
  "requirements": [
    "aiogithubapi>=22.10.1"
  ]
},
"epex_spot": {
  "version": "2.3.1",
  "requirements": [
    "bs4"
  ]
},
"better_thermostat": {
  "version": "1.5.0-beta4",
  "requirements": []
},
"scheduler": {
  "version": "v0.0.0",
  "requirements": []
},
"asterisk": {
  "version": "1.0.3",
  "requirements": [
    "asterisk-ami==0.1.6"
  ]
},
"chime_tts": {
  "version": "v0.11.1",
  "requirements": [
    "pydub"
  ]
},
"blitzortung": {
  "version": "1.0.1",
  "requirements": [
    "paho-mqtt>=1.5.0"
  ]
},
"webrtc": {
  "version": "v3.5.1",
  "requirements": []
},
"alarmo": {
  "version": "v1.9.13",
  "requirements": []
},
"unifigateway": {
  "version": "0.3.3",
  "requirements": [
    "pyunifi==2.21"
  ]
},
"nordpool": {
  "version": "0.0.14",
  "requirements": [
    "nordpool>=0.2",
    "backoff"
  ]
}
},
"integration_manifest": {
"domain": "better_thermostat",
"name": "Better Thermostat",
"after_dependencies": [
  "climate"
],
"codeowners": [
  "@kartoffeltoby"
],
"config_flow": true,
"dependencies": [
  "climate",
  "recorder"
],
"documentation": "https://github.com/KartoffelToby/better_thermostat",
"iot_class": "local_push",
"issue_tracker": "https://github.com/KartoffelToby/better_thermostat/issues",
"requirements": [],
"version": "1.5.0-beta4",
"is_built_in": false
},
"data": {
"info": {
  "name": "BT Wohnzimmer",
  "temperature_sensor": "sensor.gw1000a_v1_7_5_indoor_temperature",
  "off_temperature": 18,
  "humidity_sensor": "sensor.gw1000a_v1_7_5_indoor_humidity",
  "outdoor_sensor": "sensor.gw1000a_v1_7_5_outdoor_temperature",
  "window_sensors": "binary_sensor.sensor_balkontur_window_door_is_open",
  "weather": null,
  "window_off_delay": 0,
  "model": "Spirit/Spirit",
  "window_off_delay_after": 0,
  "tolerance": 0.0,
  "target_temp_step": 0.1
},
"thermostat": {
  "climate.heizung_schreibtisch": {
    "name": "Heizung Schreibtisch",
    "state": "heat",
    "attributes": {
      "hvac_modes": [
        "off",
        "heat"
      ],
      "min_temp": 8,
      "max_temp": 28,
      "preset_modes": [
        "none",
        "Energy heat",
        "Full power",
        "Manufacturer specific"
      ],
      "current_temperature": 20.4,
      "temperature": 19.5,
      "preset_mode": "none",
      "friendly_name": "Heizung Schreibtisch",
      "supported_features": 17
    },
    "bt_config": {
      "calibration": "target_temp_based",
      "calibration_mode": "heating_power_calibration",
      "protect_overheating": false,
      "no_off_system_mode": false,
      "heat_auto_swapped": false,
      "child_lock": false,
      "homaticip": false
    },
    "bt_adapter": "zwave_js",
    "bt_integration": "zwave_js",
    "model": "Spirit"
  },
  "climate.heizung_balkonfenster": {
    "name": "Heizung Balkonfenster",
    "state": "heat",
    "attributes": {
      "hvac_modes": [
        "off",
        "heat"
      ],
      "min_temp": 8,
      "max_temp": 28,
      "preset_modes": [
        "none",
        "Energy heat",
        "Full power",
        "Manufacturer specific"
      ],
      "current_temperature": 21.8,
      "temperature": 21,
      "preset_mode": "none",
      "friendly_name": "Heizung Balkonfenster",
      "supported_features": 17
    },
    "bt_config": {
      "calibration": "target_temp_based",
      "calibration_mode": "heating_power_calibration",
      "protect_overheating": false,
      "no_off_system_mode": false,
      "heat_auto_swapped": false,
      "child_lock": false,
      "homaticip": false
    },
    "bt_adapter": "zwave_js",
    "bt_integration": "zwave_js",
    "model": "Spirit"
  }
},
"external_temperature_sensor": {
  "entity_id": "sensor.gw1000a_v1_7_5_indoor_temperature",
  "state": "19.8",
  "attributes": {
    "state_class": "measurement",
    "unit_of_measurement": "\u00b0C",
    "device_class": "temperature",
    "friendly_name": "GW1000A_Pro Indoor Temperature"
  },
  "last_changed": "2024-01-15T11:23:16.634040+00:00",
  "last_updated": "2024-01-15T11:23:16.634040+00:00",
  "context": {
    "id": "01HM6DS2RT9XW7PNCZ2SPM6993",
    "parent_id": null,
    "user_id": null
  }
},
"window_sensor": {
  "entity_id": "binary_sensor.sensor_balkontur_window_door_is_open",
  "state": "off",
  "attributes": {
    "device_class": "door",
    "friendly_name": "Sensor Balkont\u00fcr Window/door is open"
  },
  "last_changed": "2024-01-15T07:38:54.891397+00:00",
  "last_updated": "2024-01-15T07:38:54.891397+00:00",
  "context": {
    "id": "01HM60Y8HBC8CWKXPEFQWFA381",
    "parent_id": null,
    "user_id": null
  }
}
}
}
}

Description

This just happened to me: Target temperature was at 19.0°C Granularity was at 0.1°C I changed the granularity from 0.1°C to 1.0°C. The result was that the BT target temperature also changed. This time from 19.0°C to 20.2°C. I can reproduce this faulty behaviour, but not with the same results. It might be that the target temperature changes to 21.8 or whatever you can imagine. I don't know where these weird values come from.

Steps to Reproduce

Change granularity in BT settings

Expected behavior:

Granularity should change, but the current target temperature should stay as it was. It would be okay if it changes from 18.7°C to 19.0°C when the granularity was set from 0.1°C to 1.0°C

Actual behavior:

By changing the granularity the target temperature is also being changed (to an unpredictable value).

Versions

HA version: 2024.1.2 BT version: 1.5.0-beta4

Additional Information

The reason for that I regulary change the granularity of BT is described here: #1250

KartoffelToby / better_thermostat