Woodland Mansion is missing

Seed: 1561025367
I created a survival world in the latest update. I found a village, traded emeralds for a Woodland explorer map and went to the location where the mansion was supposed to be. There was no mansion. I searched the rest of the roofed forest and even entered Spectator Mode on the off-chance the mansion could spawn underground--nothing! So I recreated the seed in creative mode and /locate Mansion. Same coordinates as the map showed; I teleported to the coordinates on the recreated world and the mansion was there, right where it should be! Both worlds were created in the same version and I do not have any mods installed. Why does one world have it and the other not? Is there anything I can do to fix this glitch or do I just have to go searching for another mansion that is hopefully there?