Are there any limits to how many villagers I can have near my breeder?

So my villager used to work just fine, they were out there doing their thing, but they just don’t get it on anymore.

The server I’m on is still on Minecraft 1.13.2 so it should still work. I transport the villagers about 10-12 blocks away from the breeder itself.

Is there any way to fix this? Could it be that the server is blocking villager spawns?