Having 1 more villager than beds stops Iron Golem spawning

Bug: If you have a village that meets the requirements for generating Iron Golems, and it has the same number of villagers as bed (ex. 20 beds, 20 villagers), and all other conditions are met, if you add 1 additional villager that does not have a bed to link to, the village will stop producing Iron Golems.

Repro:

1. Load

1. Watch for iron golems spawns.

2. Spawn 1 additional villager so you have 21 villagers for 20 beds.

Observed result:

The village will stop producing golems. If you then remove that villager, the village will start producing golems again.

Expected result:
More villagers than beds should not stop iron golems from spawning in a village, as long as 75% of villagers are working. The number of bed + villager combination, after reaching the minimum 20 beds and 10 villagers, is supposed to dictate how many golems can simultaneously exist in the village (1 golem per 10 occupied beds).