It's not a bug, it's a feature!
No, really The bees HAVE to go outside, so they need the map temperature to be adequate. This is to force you to use the climatized (and with the update, advanced climatized) beehouses to progress in "hard" biomes. Also, as far as I know, you can't have honey bees easily pollinate in a greenhouse!
As for plant pollination, bonus to plant growth would be laggy with many beehouses, so the way I coded it is that any crop harvested in a 6 tiles radius of a working beehouse has a 25% chance to be automatically replanted at 0.25 growth, thus increasing total crop yield in the medium term. Much more CPU friendly!
No, really The bees HAVE to go outside, so they need the map temperature to be adequate. This is to force you to use the climatized (and with the update, advanced climatized) beehouses to progress in "hard" biomes. Also, as far as I know, you can't have honey bees easily pollinate in a greenhouse!
As for plant pollination, bonus to plant growth would be laggy with many beehouses, so the way I coded it is that any crop harvested in a 6 tiles radius of a working beehouse has a 25% chance to be automatically replanted at 0.25 growth, thus increasing total crop yield in the medium term. Much more CPU friendly!