[MC-187141] World landmarks don't spawn their respective mobs

I recently updated to 20w22a and realized that the ocean monuments that I loaded before updating to the snapshots weren't spawning guardians. The same issue occurred with wither skeletons as well.

Related issues

duplicates

MC-186096 Some Structures generated pre-20w21a still have no valid Spawns respective mobs

Comments

migrated 2020-06-03T06:55:53Z

Hello
I came to report that I have had the same issue.
I built an guardian farm, before snapshots. My problem occured when updating from snapshot 20W20b to 20W21a and it is still in the latest 20W22a snapshot.

Can confirm that it seems to be only guardian temples loaded before snapshots that seems to be affected.

MMK21 2020-06-03T07:45:42Z

Duplicate of MC-186096

Jarl-Penguin 2020-06-03T08:57:24Z

Did you upgrade from a previous 1.16 snapshot, or from 1.15.2?

migrated 2020-06-03T09:41:07Z

@Jarl-Penguin I upgraded from 1.15.2 to 20W21A then to 20W22A.