OH2.5: NTP does not update automatically

Dear All,

I just realized that in my old-fashioned openhab 2.5 instance, NTP Date and Time seem to no longer being updated automatically (i.e. sent perodically to the bus).

When I change an NTP-Item manually in the .items file, there is a one time update performed, but not a regular update each 60s as it was before.

my config is as follows:

ntp.things:

ntp:ntp:myNTP  [ hostname="de.pool.ntp.org", refreshInterval=60, refreshNtp=30 ]

knx.things:

Thing device knx_virtual_2 "KNX-virtual"  {
        Type datetime-control : date [ ga="11.001:0/0/1" ]
        Type datetime-control : time [ ga="10.001:0/0/2" ]

    }

knx.items:

DateTime        Current_Date    "Das Datum [%1$tA, %1$td.%1$tm.%1$tY %1$tH:%1$tM]"      <calendar>    (Status)    {channel="knx:device:bridge:knx_virtual_2:time",channel="ntp:ntp:myNTP:dateTime" }
DateTime        Current_Date_veryNew  "Das Datum PLAYGROUND [%1$tA, %1$td.%1$tm.%1$tY %1$tH:%1$tM]" (Status)    { channel="ntp:ntp:myNTP:dateTime" }

I can’t realy make up my mind why this simple interation is no longer working - i know OH2.5 is old (very old) but it was very reliable till now.

Thanks a bunch in advance

Hans