Countdown gate open avatar move my clock freeze to 0:00

Hello in the start of the race my clock freeze 0:00 for several secondes . i was doing a huge sprint. On zwift result we see my hr high at 0:00 @ 168watt. Its because it didnt register my 15secondes sprint 700w of the start. As soon i stopped pushing hard the clock resume. The game start to collect my data as you can see @ 0:00 168watt hearthrate is high

I will record every race from now so if happen again u guys will understand