The Happy Ghast cause a slowness in the world. Here is a complete summary.

Hi, I'm reporting a bug in Minecraft Bedrock since version 1.21.91. When Happy Ghasts are tied to the reins, the world slows down. I don't know if it also happens on the servers. The slowdown lasts 30 seconds and then returns to normal. I'm sending you a video from Android. I don't know if it also happens on other devices using Minecraft Bedrock. I hope it's fixed soon in the next update.