Q: Triggering random phase at pattern start

I’ve been playing with the settings for playing random phase instruments at the beginning of the pattern for a while. I’m trying a key-tracker with hydra, LFO and others but no progress. changes are also triggered in phase, which is logical when using a key-tracker. I play with keyzones and overlapping zones, but I still can’t do what I need. is there any simple procedure? what about Y00?