Time Sync Sample doesn't work. No time update from TTN

Arduino LMIC
1

Just tried out the example arduino-lmic/examples/ttn-otaa-network-time
that should retrieve the time sync. But after successfully join
I get:

...
Packet queued
18636889: EV_TXCOMPLETE (includes waiting for RX windows)
18702408: EV_TXSTART
19082091: EV_TXCOMPLETE (includes waiting for RX windows)
USER CALLBACK: Not a success
22832109: EV_TXSTART
Packet queued
23151563: EV_TXCOMPLETE (includes waiting for RX windows)
23217081: EV_TXSTART
23596765: EV_TXCOMPLETE (includes waiting for RX windows)
USER CALLBACK: Not a success
27346783: EV_TXSTART
...

Is this example outdated and did not work any longer or any hint for a working TTN Time Sync example ?

2

We’re using time synch in production sketches, so in some sense it works. Please give some more details (board, region, netwrok, etc.). Thansk,

–Terry