core: After restart of Home Assistant Modbus registers sometimes show wrong values until new restart of HA

The problem

After restart of Home Assistant some values of Modbus registers show wrong values. Only solution is to restart Home Assistant again then it is working fine most of the time

Environment

• Home Assistant Core release with the issue: 0.115.6
• Last working Home Assistant Core release (if known): 0.114 or 0.113
• Operating environment (OS/Container/Supervised/Core): Home Assistant OS as VirtualBox VM
• Integration causing this issue: Modbus
• Link to integration documentation on our website: https://www.home-assistant.io/integrations/modbus/

Problem-relevant configuration.yaml

modbus:
  name: SolvisRemote
  type: tcp
  host: <ipofheatingsystem>
  port: 502


sensor:
  - platform: modbus
    scan_interval: 30
    registers:
    - name: Warmwasserpuffer
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33024

    - name: Warmwassertemperatur
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33025

    - name: Speicherreferenztemperatur
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33026

    - name: Heizungspuffertemperatur oben
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33027

    - name: Aussentemperatur
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33033

    - name: Heizungspuffertemperatur unten
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33032

    - name: Zirkulationsdurchfluss
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33034

    - name: Vorlauftemperatur
      hub: SolvisRemote
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33035
  
#    - name: Kaltwassertemperatur
#      hub: SolvisRemote
#      unit_of_measurement: °C
#      scale: 0.1
#      slave: 1
#      precision: 2
#      register_type: input
#      register: 33038
      
    - name: Durchfluss Warmwasserzirkualation
      hub: SolvisRemote
      unit_of_measurement: l/min
      slave: 1
      precision: 2
      scale: 0.1
      register_type: input
      register: 33041

    - name: Laufzeit Brenner
      hub: SolvisRemote
      unit_of_measurement: h
      slave: 1
      precision: 0
      register_type: input
      register: 33536

    - name: Brennerstarts
      hub: SolvisRemote
      unit_of_measurement: Starts 
      slave: 1
      precision: 0
      register_type: input
      register: 33537

    - name: Brennerleistung
      hub: SolvisRemote
      unit_of_measurement: kW
      scale: 0.1
      slave: 1
      precision: 2
      register_type: input
      register: 33539

    - name: Ionisationsstrom
      hub: SolvisRemote
      unit_of_measurement: mA 
      slave: 1
      scale: 0.1
      precision: 1
      register_type: input
      register: 33540

    - name: A01.Pumpe Zirkulation
      hub: SolvisRemote 
      slave: 1
      unit_of_measurement: V
      scale: 0.01
      precision: 0
      register_type: input
      register: 33280

    - name: A02.Pumpe Warmwasser
      hub: SolvisRemote 
      slave: 1
      unit_of_measurement: V
      scale: 0.01
      precision: 0
      register_type: input
      register: 33281

    - name: A03.Pumpe HK1
      hub: SolvisRemote 
      slave: 1
      unit_of_measurement: V
      scale: 0.01
      precision: 0
      register_type: input
      register: 33282

#    - name: A05.Pumpe Zirkulation
#      hub: SolvisRemote 
#      slave: 1
#      unit_of_measurement: V
#      scale: 0.01
#      precision: 0
#      register_type: input
#      register: 33284

    - name: A12.Brennerstatus
      hub: SolvisRemote 
      slave: 1
      unit_of_measurement: V
      scale: 0.01
      precision: 0
      register_type: input
      register: 33291
      
    - name: WW Nachheizung 2322
      hub: SolvisRemote 
      slave: 1
      #unit_of_measurement: V
      #scale: 0.01
      #precision: 0
      register_type: holding
      register: 2322
      
    - name: HKR1 Betriebsart
      hub: SolvisRemote 
      slave: 1
      register_type: holding
      register: 2818  


    
  - platform: modbus
    scan_interval: 300  
    registers:
    - name: HKR1 Absenktemperatur Nacht
      hub: SolvisRemote 
      unit_of_measurement: °C
      slave: 1
      register_type: holding
      register: 2821

    - name: HKR1 Solltemperatur Tag
      hub: SolvisRemote 
      unit_of_measurement: °C
      slave: 1
      register_type: holding
      register: 2820

    - name: DigIn Stoerungen
      hub: SolvisRemote 
      slave: 1
      register_type: input
      register: 33045
      
    - name: WW Solltemperatur
      hub: SolvisRemote 
      unit_of_measurement: °C
      slave: 1
      register_type: holding
      register: 2305

    - name: VersionSC2
      hub: SolvisRemote 
      slave: 1
      scale: 0.01
      precision: 2
      register_type: input
      register: 32770

    - name: VersionNBG
      hub: SolvisRemote 
      slave: 1
      scale: 0.01
      register_type: input
      register: 32771

    - name: ZirkulationBetriebsart
      hub: SolvisRemote 
      slave: 1
      register_type: input
      register: 2049
      
      
    - name: Raumtemperatur_HKR1
      hub: SolvisRemote 
      unit_of_measurement: °C
      scale: 0.1
      slave: 1
      register_type: holding
      register: 34304
  

Traceback/Error logs

Additional information

Starting in Home Assistant 0.114 (I think) sometimes some of my Modbus Sensors are showing wrong values after restarting Home Assistant. The value is then way too high, for example I am reading temperature values or the current heating power of my house heating-system. Instead of showing the actual outside temperature it is showing a value of over 40°C or a heating power off 440 kW instead of 3 kW for example. Restarting Home Assistant is the only solution I found so far for resolving the problem. Some problematic Sensors in configuration are: “Aussentemperatur” or “Brennerleistung”

Modbus Device is a Solvis Heating System. Had no problems before 0.114