Shelly UNI scene - switch off not working

  • I've set up a scene where Shelly Unis are turning on one after another. Like

    Turn on channel 1:1

    Delay 20 minutes turn off channel 1:1

    Delay 21 minutes turn on channel 1:2

    Delay 41 minutes turn off channel 1:2

    Delay 42 minutes turn on channel 2:1

    Delay 62 minutes turn off channel 2:1

    It's working as expected EXCEPT that the last command is not executed. The last switch 2:1 stays on indefinitely.

    Any ideas?