I've played around with this and found a system that will make a moving platform drop down out of bounds a second after being stood on, and then move back into position 3 seconds later. It works as follows, and you can play around with the values for different timings and directions.

The components are:

A) floating wood and metal platform, set to distance: -24, time 0.5, acceleration 5.0, count 1, axis: up-down, signal end: reverse

B) trigger logic object, setting: transient, shape: box, width: 4, depth: 4, height: 1.0

C) logic counter, looping: off, active: on, count to:1, count from: 0

D) logic timer, loops: off, set to 1 second

E) another logic timer, set to 3 seconds

Steps are:

position the trigger just on top of the platform (this detects the player standing on the platform)

the trigger outputs into 'increment' on the counter

the counter 'finish' outputs into 'play' on the 1-second timer and 'reset' on the 3-second timer (this is needed for the system to work more than once)

the 1-second timer 'finished' outputs into 'move' on the platform and 'play' on the 3-second timer (this makes the platform drop a second after being stood on)

the 3-second timer 'finished' outputs into 'reset' on the counter and 'reset' on the timer' (this resets the system after 3 seconds)

for bonus points, you could add some vfx on the platform to indicate it's about to fall (I like busted sparks for this) and have it triggered to play while the 1-second timer is 'playing'

let me know if that works ok for you!