Hi @revaprerana, we’ve encountered a number of issues with the Arduino Scheduler since our server update back in February, including others with this same issue. Because of these we’ve decided to re-factor the Arduino Scheduling architecture and aren’t planning any bugfixing for issues related to it until we have that out the door. I’ll have better information on what the timeframe will be for that later this week.
Right now the only solution I’ve found that seems to work is waiting until after the 1st event to schedule the 2nd event, but obviously for many real world scheduling cases that’s not very useful.