Group ride: Could not roll off from start line

My setup:

  • PC windows 10
  • Zwift updated before the event
  • ant+ dongle
  • tacx neo 2t

Yesterday, as usually I prepared for a group ride, this time I joined the C group in “Hotchillee Gain train”, starting 19:34 UTC+1

Preparing as usual, power, heartrate, cadence, all parameters fine showing on zwift and companion, so far so good.

Countdown was ticking and then, all riders were off, only me standing, despite power showing in zwift and companion.

What happened to me?
Who has set my brake? :wink:

Moments later I joined another group ride all was fine.