Tapping/opening a world got slower

Dear Mojang,

I found a bug where tapping/opening a world got slower. It takes time to load before showing "Building Terrain". If it's not a bug, I'm hopefully you can still fix it as soon as possible. I remember before 1.17.32 where choosing world instantly pops out a Minecraft tips. Thank you! Have a great day!

Sincerely,
RedPikNik