Villagers keep spawning a child without an available bed

"This bug has been affecting me since version 1.20, almost before the update where they added the cherry blossom biome. I have a large community of villagers. I have a building just for librarian villagers and another for farmer villagers. I understand that villagers only spawn other villagers when there is an available bed nearby; however, my villagers always spawn a new villager even if there isn't a bed. The first time this happened, I thought that maybe I had left a bed somewhere, but I searched through all the blocks on all levels (using spectator mode in a copy of my world) and there are no beds placed anywhere. On one occasion, I waited until nighttime and killed all the villagers running around without a bed, made sure all the beds were occupied by one of my villagers, and even then, when dawn came, the villagers got up and spawned a new one. This is very annoying because every night I have one or two villagers running around looking for a bed they never find."