My gold farm has suddenly become hyper-hyper-efficient, as you can see in this video- https://www.youtube.com/watch?v=KdahMg15Q3Y . The pigmen (from what I can tell) keep spawning way past the usual mob cap, the highest I ever saw the numbers is below in the attached screenshot.
What is the randomTickSpeed of your world? I can't replicate the bug on my end in a newly created world, unless I change the tickspeed.