Turn off all lights working serially

Hi all;
I am using smartthings goodbye routine to close about 8 lights. I have a sharptools tile to activate this routine.
It seems like this thing works serially and not in parallel. one after the other one the lights close and not together.
is this a zwave protocol thing? a smartthings thing? a sharptools thing?

It sounds like a SmartThings / Z-Wave thing.

Routines are sent across as a single command from SharpTools to SmartThings. From there, SmartThings takes over and runs the commands in the routine.

Unfortunately, running multiple commands can sometimes have a slight delay between each command resulting in a “popcorn effect” where each light comes on a heartbeat later than the last. You might search the SmartThings community to see what options you have.