POLAR@3: Component tests are not always working

[dopenguin]

Describe the bug

Component tests are not working if useCoreStore is used in a component. Using useMainStore would work on the other hand. It is suspected that the re-export of some variables causes this issue.

Expected behavior

Component tests would work if a component uses useCoreStore.

Steps to reproduce

1. Remove .skip in FullscreenUI.spec.ts
2. npm run test
3. Tests are failing

Additional context
next