When many players are online, it is hard to find mobs. In nether, there was very few mobs when there were 25 players on server. Can the mob limit be raised so more mobs can spawn?
Not sure if KCauldron supports it, but a dynamic mob limit, increasing per player, would be nice, although it would probably need to have diminishing returns to stop high player counts causing too much of an issue.
The mob limit is at 120 per 3x3, that's a lot. Last week we disabled it completely for a few days unfortunately it didn't impact the mob spawn in any way. It is planned to compare a forge server with a cauldron server to see if it is caused by cauldron.