By the math, there should be bosses spawning every hour. Not every boss, every hour. But some bosses, every hour. Vague and EVIL!!Oh so you’ve basically shortened the amount of time required for a legacy to be “due” which was an average of 2 weeks. Not its an hour. If that’s true, no one really predict when a boss will spawn and technically, a certian boss could never actually spawn once killed lol.
Well, to say they'll all spawn in an hour isn't exactly correct either... it's just kinda what it amounts to for the way the code works... But to answer your questions directly, it will try again after some time.
Jk :p 0o