With the following configuration:

scope.ServiceProvider.UseScheduler(scheduler => { scheduler.OnWorker(message.Text); scheduler.ScheduleWithParams<MessagesInvocable>(message) //.Cron($"{DateTime.UtcNow.Minute} {DateTime.UtcNow.Hour} {DateTime.UtcNow.Day} {DateTime.UtcNow.Month} *") .EverySeconds(1) .PreventOverlapping(message.Text) .Once(); });

And executing this for 10 messages I always have more than one execution for at least one message.

Why do you think this happens?