Parent pipeline execution time not matching with snap execution time

We found an issue with parent pipeline execution timings where all the individual snap are taking much less time than the original pipeline. For example, the for each snap is taking 40 seconds, the other snaps (around 15 in total) are taking around 15 seconds. But the pipeline is taking around 1 minutes and 50 seconds. Is this any issue with snaplogic or is this something that is occurring due to any particular snap?

Please note that we are using only basic redshift execute/insert/bulk load snap and postgres insert/execute snaps only.