Happy ghasts lag your worlds

I noticed TPS lag at my base ever since I updated, everything started to slow done frequently. In creative copy of my world I was deleting various parts of my base thinking it's either redstone or mobs but the lag was still there. Then I killed 2 happy ghasts and the lag was gone. To make sure it's because of happy ghasts I spawned a bunch of them and TPS tanked even worse. Killing them all removes the lag.