morph target sync with webGPU, react 19 issue

[Suprhimp]

Hi, I found some strange point with morphtarget.

this is react 18, (r3f 8.17 version ) example code:

https://codesandbox.io/p/sandbox/webgpu-morphtarget-test-react19-forked-9k7gm9

As you can see, when you control the 'width' key of the morphtarget, two box are morph change same.

But in react19 (r3f 9.3.0 version) :
https://codesandbox.io/p/sandbox/iridescent-decals-forked-jx3xkz

Morph target value adjust one of the box.

The most strange thing is when I rotate camera, the synced box with morph target seems change.

2025-08-11.9.05.43.mov

When I remove about webgpu setting(use webGL) it goes well.

I think this is might be crucial bug..

[krispya]

Interesting... thanks for sharing this. I don't know when I will be able to look but it is on my radar!

[Suprhimp]

I'd like to contribute to handle this issue desperately but, as you know this is about react issue I don't have any idea what should I look at.

Do you have any idea or plan to fix this issue, I would like to help if I can... (Because I need to fix this issue ASAP..)
@krispya

[krispya]

Hi, I can look at fixing it this week. It's tough to say if I can get to it during the week since I have a day job but if not this weekend.

[Suprhimp]

@krispya Hi Any update yet ? :)