Description
When using copy_texture_to_texture with the webGL2 backend and array textures I get invalid data displayed. It's hard to tell exactly what is going wrong since I can't really debug the code. I tried SpectorJS but it does not show individual textures.

Repro steps
Clone:
https://github.com/StarArawn/bevy_ecs_tilemap

Run(wasm/webGL2/array texture):

cargo build --target wasm32-unknown-unknown --example iso_diamond --release
wasm-server-runner .\target\wasm32-unknown-unknown\release\examples\iso_diamond.wasm

Run(wasm/webGL2/atlas):

cargo build --target wasm32-unknown-unknown --example iso_diamond --release --features atlas
wasm-server-runner .\target\wasm32-unknown-unknown\release\examples\iso_diamond.wasm

Run(desktop)

cargo run --example iso_diamond

Expected vs observed behavior
Compare with the desktop or atlas versions and you can see the issue.

Extra materials
None

Platform
Chrome/WebGL2