Broken spawn rates in soul sand valleys and warped forests

Spawn rates for certain mobs are way too high in the warped forest and soul sand valley. This causes the following problems:

• Warped forests spawn as many endermen as the End dimension itself
• Soul sand valleys spawn too many ghasts, at least ten times more than nether wastes or basalt deltas. (with rough estimates, soul sand valleys usually have 5 ghasts, while nether wastes and basalt deltas sometimes have a ghast)
• Soul sand valley ghast spawn rate breaks other mob spawning as well. As ghast spawn attempts fail, endermen and fortress mobs build up and spawn way more than usual. This event doesn't happen in other biomes, so it's definitely the ghasts.