Today I played Minecraft on the server 1.19.1. I wanted to duplicate a lot of Allays! I did it near to a large warehouse of one player, where there are a lot of barrels and chests. When I duplicate 20 or more Allays, the TPS of the server began to decrease and appeared server lags.
Then the admin came to the server, because a good computer where the server is hosted was very laggy. We started to think why the server was lagging if there were no lags when other player also duplicate about 20 Allays, but in a closed room.  Then we thought that maybe Allay somehow analyzes chests and barrels, I don't know. But since there are a lot of chests and barrels here, Allay analyzes a lot and lags appear on the server. I tried to bring Allays in the ocean, the lags disappeared. Then I brought Allays to my island made of barrels and the lags came back! Please note, with other mobs in these places, the server doesn't lag, but when I bring more than 20 Allays, the server starts lagging.
I'm afraid that if I dublicated 70 or 100 Allays, I could crash the server. And I even wanted to duplicate so many Allays, because Allays are cool! But after that I didn't do it...
So please fix it if you can.

Read about it more carefully. I said not about crash of Minecraft. I said about the possible crash of the server. I will clarify that we didn't bring the server to crash, the server was laggy very much because of to the fact that Allays seemed to analyze a lot of chests or barrels