J Z

Having the same issue on Fedora KDE Plasma using Wayland.

My specs are: i9-10900k, RTX 2070 SUPER, 32 GB RAM.

Can confirm. My FPS went from around 800 to 120. With Vulkan in 26.2 Snapshot 1, it is even worse and I get 60 FPS, while it is still 120 with OpenGL.

They are actually not the same thing. I created MC-186068 after erroneously upgrading the world from a previous version. 20w22a is thus not an affected version for MC-186068 if this bug report is to be moved over there.

I found an instance in 26.1 Snapshot 11 where a tree’s leaves got cut off.

World Type: Single Biome (Jungle)

Seed: -7185971766306667448

Position: /execute in minecraft:overworld run tp @s 690.75 110.92 2877.78 749.10 33.30

The first sentence of this report is actually the underlying issue. Just execute

/datapack disable vanilla

and rejoin the world. This spams the logs with errors and prompts you to enable Safe Mode. It simply shouldn’t be possible to disable the Vanilla datapack.

Less severe in 26.1 Snapshot 11.

In some cases you might be launched 30 blocks or more up into the air. I think it has to do with the ghast’s height in relation to you.

The player also flies up into the air when dismounting.

This can also be reproduced with saddled striders and warped fungus on a stick.

The flying underwater is not what I reported here. I outlined in this report how the durability is decreased while not flying, but sinking/swimming/floating.

Doesn’t this duplicate MC-276842?

Can confirm.

Seems to generally happen with multiple layers of translucent blocks.

All graphics modes are affected.

Fixed in 25w09a.