Monuments not spawning guardians

What version was the world created in?

Was a new pre release map

New created map in pre release snapshot, same problem, also found that it was not locating Monuments even though I was close to one. maybe the cause for the issue, of it not recognizing the structure as such for spawn algorithm.

Guardians are spawning just fine in 1.13 pre-1 for me, so it seems this bug doesn't affect everyone.

Is this still an issue in Minecraft 1.13.2?