The problem is they had no system to deal with riders being late.
Since everyone has a fixed start time, any late riders interfere with the start times of the riders behind them. The current 20 sec gap Btw riders is too tight to let late riders go without potentially interfering with the run of the rider behind.
I know what the organisers are trying to do and theoretically it is correct, but the system of implementation is completely wrong.
The winter series at Inners used ‘dibbers’ like orienteers use, that records transition and run times and is a much better system than the ‘fixed’ start time method.