[vue/compat] createApp copy singletonApp configs even set { mode:3 } to compatConfig

[Shana-AE]

Version

3.2.31

Reproduction link

github.com

Steps to reproduce

run yarn dev, see main.ts and see console output, compare two app's config.globalProperties.

I'm not very sure whether it's a bug or I used it wrong. I read a little code from createApp to applySingletonAppMutations roughly, I didn't find config to turn this behavior off.

What is expected?

{mode: 3} shouldn't copy app configs to another.

What is actually happening?

createApp copied app configs.

[snoozbuster]

+1 on this. I have a minimal repro codesandbox as well. the two apps created with createApp share components, directives, and mixins, even on configureCompat({ MODE: 3 }) which I would expect to be 100% identical to running without the compat build at all.