The puddle splash damage bonus duration is sometimes far less than it should be, Seems to get off related to the pulverize overpower timer and other overpower sources. Though not really sure.
The extra hits and pulverize shockwave hits don’t seem to be counted as puddle hits.
For a quick note to make it more useful remove the timer and make it so that if you overpower a ground without a puddle that it spawns a puddle. If you hit a puddle that’s already there just do the splash and don’t spawn another puddle.