Before, 4 wheeworts would be able to handle the heat generated from an electrolyzer set up easily, often needing automation to shut them down.
Now, however, 5 wheezeworts simply cannot keep up with the same setup, maybe the game is still considering them as wild even though they are planted and fertilized.
Steps to Reproduce
plant a wheezewort, and check the about of cooling it provides
This issue has not been confirmed by a developer yet.