So, I found some information that explained that when someone acts out of Stealth on any actor, initiative is rolled immediately. The only question this leaves, if true, is what will AI do when a Rogue attacks and bonus actions Hide in the same round and that is the only combatant involved, or if all other hostile PCs/NPCs are hidden?
It's a step in the right direction but it still leaves so many questions about specific interactions and mechanics.
Hostile NPCs “should” move towards the last known location of a hidden PC. As per 5E rules, your position should revealed whenever you attack. You can only move so far and hide after making an attack, so any NPC using dash should eventually be able to find a rogue by dashing towards the last known location.
