Added tests to illustrate a bug and fix it ;)

[Christian24]

This adds tests for #502 and closes #502.

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Codecov Report

Attention: 19 lines in your changes are missing coverage. Please review.

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Files	Coverage Δ
packages/form-core/src/utils.ts	89.13% <ø> (ø)
packages/react-form/src/createFormFactory.ts	100.00% <100.00%> (ø)
packages/react-form/src/formContext.ts	83.33% <ø> (ø)
packages/react-form/src/useForm.tsx	89.47% <100.00%> (+0.58%)	⬆️
...ckages/react-form/src/useIsomorphicLayoutEffect.ts	100.00% <100.00%> (ø)
packages/solid-form/src/createFormFactory.ts	100.00% <100.00%> (ø)
packages/solid-form/src/tests/utils.ts	100.00% <100.00%> (ø)
packages/yup-form-adapter/src/tests/utils.ts	100.00% <100.00%> (ø)
packages/yup-form-adapter/src/validator.ts	100.00% <100.00%> (ø)
packages/zod-form-adapter/src/tests/utils.ts	100.00% <100.00%> (ø)
... and 7 more

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