Much more common with Philippines fish in the early 2000s, by mid-late 2010s super rare with Philippines fish, but much more common with fish labeled as coming from "Indonesia"
@i cant think based on when your tilefish died and how long it was in your tank, I'd lean much more towards internal damage from jumping out. Cyanide is very unlikely with how long you owned the fish and the fact that it ate relatively well for you. Don't be afraid to open up a recently deceased fish and try to see what happened, especially with death by unknown cause. Often times it's pretty obvious once you open them up, and without opening them, you'd never figure out the issue. It can be a nice consolation knowing what happened and that you didn't do anything wrong, especially in the case of cyanide collected fish, and also lets you know what wholesalers and importers to avoid in those situations.