"Level 2"-screens / Groups in Apple Watch App do not load

I’m running openHAB 3.3 with the iOS App 2.4.49. While the iOS App works perfectly well, on the Apple Watch App all screens that are on “level 2 / Groups” (refer to the screenshot below) do not load.

When e.g. I click on “Andere” on the Apple Watch App (or any other button in the sitemap that should lead to a “level 2”-screen)…
incoming-779D4B9C-4BA9-44C0-86DB-CE60AB8A871E

… a new screen loads / slides to the right, but after 1 second I get thrown back to the main screen (surprisingly still with the name of the to-be-loaded screen on the top right corner):
incoming-133E87B2-19A7-4148-96E8-24D0322EDADE

My code looks ok to me (at least the iOS App works), but maybe there’s something wrong in there that only affects the Apple Watch App?

sitemap watch label="XXXXX" {

{... some code removed here... }

    Frame label="Verbräuche" {
        Text label="Wasser, Strom, Wärme" icon="water" {
            Text item=Stromzaehler_Electricmeterwatts label="Hausanschluss Leistung"
            Chart item=Stromzaehler_Electricmeterwatts refresh=60000 service="influxdb" period=D

            Text item=kaltwasserzaehler_leistung label="Kaltwasser"
            Chart item=kaltwasserzaehler_leistung refresh=60000 service="influxdb" period=M

            Text item=warmwasserzaehler_leistung label="Warmwasser" icon="temperature"
            Chart item=warmwasserzaehler_leistung refresh=60000 service="influxdb" period=M

        }
    }

    Frame label="Umwelt" {
        Text label="Temperatur, Luftfeuchte, Helligkeit" icon="sun" {
            Text item=Thermostat_Garten_ActualTemperature label="Temperatur"
            Chart item=Thermostat_Garten_ActualTemperature refresh=60000 service="influxdb" period=W

            Text item=Thermostat_Garten_Humidity label="Luftfeuchte"
            Chart item=Thermostat_Garten_Humidity refresh=60000 service="influxdb" period=W

            Text item=Lichtsensor_Garten_HighestIllumination label="Lichtsensor"
            Chart item=Lichtsensor_Garten_HighestIllumination refresh=60000 service="influxdb" period=W
        }
    }

    Frame label="Pflanzen" {
        Text label="Bodenfeuchte, Ventilstatus, Zisterne" icon="lawnmower" {
            Text item=Feuchtigkeitssensor_Blumen_SoilHumidity label="Bodenfeuchtigkeit Töpfe" icon="lawnmower"
            Chart item=Feuchtigkeitssensor_Blumen_SoilHumidity refresh=60000 service="influxdb" period=M
            Text item=Bambus_Feuchtigkeitssensor_SoilHumidity label="Bodenfeuchtigkeit Bambus" icon="garden"
            Chart item=Bambus_Feuchtigkeitssensor_SoilHumidity refresh=60000 service="influxdb" period=M
            Text item=Zisterne_Fuellstandssensor_FillingLevel label="Füllstand" icon="cistern"
            Chart item=Zisterne_Fuellstandssensor_FillingLevel refresh=60000 service="influxdb" period=M icon="cistern"
        }
    }

    Frame label="Licht" {
        Text label="Licht" icon="light" {
            Slider item=Kuche icon="light" label="Küche"
            Slider item=Wohnzimmer_Deckenlampe icon="light" label="Wohnzimmer"
            Slider item=Stehlampe icon="light" label="Stehlampe"
            Switch item=LichtGarten_3_STATE icon="light" label="Gartenbeleuchtung"
        }
    }

    Frame label="Rolladen" {
        Text label="Rolladen" icon="rollershutter" {
            Slider item=Rolladen_Kueche_Links icon="rollershutter"
            Slider item=Rolladen_Kueche_Rechts icon="rollershutter"
            Slider item=Rolladen_Wohnzimmer_Links icon="rollershutter"
            Slider item=Rolladen_Wohnzimmer_Rechts icon="rollershutter"
            Slider item=Rolladen_Leo_links icon="rollershutter"
            Slider item=Rolladen_Leo_Mitte icon="rollershutter"
            Slider item=Rolladen_Leo_Rechts icon="rollershutter"
            Slider item=Rolladen_Schlafzimmer icon="rollershutter"
            Slider item=Rolladen_Bad icon="rollershutter"
        }
    }
    Frame label="Heizung" {
        Text label="Heizung" icon="heating" {
            Frame label="Wohnzimmer" {
                Text item=Thermostat_Wohnzimmer_ActualTemperature label="Temperatur"
                Setpoint item=Thermostat_Wohnzimmer_SetPointTemperature step=0.5 minValue=5 maxValue=30 label="Solltemperatur"
                Switch item=Thermostat_Wohnzimmmer_ControlMode label="Modus" mappings=[1="Manuell", 3="Automatisch"]
                Text item=Thermostat_Wohnzimmer_9_STATE label="Ventilstatus [%.0f]"
                Chart item=Thermostat_Wohnzimmer_ActualTemperature refresh=60000 service="influxdb" period=W icon="settings" label="Test"
            }  
            Frame label="Leo" {
                Text item=Thermostat_Leo_ActualTemperature label="Temperatur"
                Setpoint item=ThermostatLeo_SetPointTemperature step=0.5 minValue=5 maxValue=30 label="Solltemperatur"
                Switch item=ThermostatLeo_ControlMode label="Modus" mappings=[1="Manuell", 3="Automatisch"]
                Text item=ThermostatLeo_9_STATE label="Ventilstatus [%.0f]"
                Chart item=Thermostat_Leo_ActualTemperature refresh=60000 service="influxdb" period=W icon="settings" label="Test"
            } 
            Frame label="Schlafzimmer" {
                Text item=Thermostat_Schlafzimmer_ActualTemperature label="Temperatur"
                Setpoint item=ThermostatSchlafzimmer_SetPointTemperature step=0.5 minValue=5 maxValue=30 label="Solltemperatur"
                Switch item=Thermostat_Schlafzimmer_ControlMode label="Modus" mappings=[1="Manuell", 3="Automatisch"]
                Text item=ThermostatSchlafzimmer_9_STATE label="Ventilstatus [%.0f]"
                Chart item=Thermostat_Schlafzimmer_ActualTemperature refresh=60000 service="influxdb" period=W icon="settings" label="Test"
            } 

        }
    }

    Frame label="Sensor Status" {
        Group item=gMonitor
    }
}

Quick update on this: From what I can see, this is not a bug but a missing feature. See here: