Reproduction

https://codesandbox.io/p/devbox/competent-feather-24dw95

Steps to reproduce the bug

1. Create a store with object state and an action
2. Change that state in component through interaction
3. Update your action's code
4. Observe that the state was reset to a default one

Expected behavior

State should be preserved.

Actual behavior

State is reset to a default value.

Additional information

The bug happens with Vue 2 and Vite. Not sure if it also applies to Vue 3 due to different reactivity systems.