Element Type 'Chart' - defined label not shown

  • Platform information:
    • Hardware: RP3B+
    • OS: Raspian
    • openHAB version: 2.4

I have defined some charts with jdbc-service.

  Text item=pc_power_1 {
  	//Chart item=pc_power_1 service="jdbc" period=D refresh=1000 legend=true label="Leistung (gesamt)"
  	//Chart item=Strom_bekannt service="jdbc" label="Leistung (bekannte Verbraucher)" period=D refresh=1000 legend=true
  	Chart item=gStromLeistung label="Leistung" service="jdbc" period=D refresh=5000
  	Text item=pc_power_1
  	Text item=Strom_bekannt {
  		Chart item=Gosund1_powerload label="Fluter" service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund2_powerload label="Adrian" service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund3_powerload label="Gabriel"service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund4_powerload label="Waschmaschine" service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund5_powerload label="Spülmaschnie" service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund6_powerload label="Media" service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund7_powerload label="Kühlschrank" service="jdbc" period=D refresh=5000 legend=true
  		Chart item=Gosund8_powerload label="Wolfgang" service="jdbc" period=D refresh=5000 legend=true
  	}
  	Chart item=Strom_unbekannt label="Differenz Leistung (gesamt) und leistung (bekannte Verbraucher)" service="jdbc" period=D refresh=1000 legend=true
  }

But when I look at the sitemap the labels are not shown.
What ist the mistake ?

Thanks a lot

Wolfgang