Steps to reproduce

Check the A checkbox — isDirty becomes true.

Uncheck the A checkbox (returning it to its initial state).

Observe that isDirty is still true.

Also try checking the D checkbox and observe how isDirty changes.

Expected behavior

If a field is changed and then reverted back to its initial value, isDirty should return to false.

Actual behavior

isDirty remains true even after reverting the checkbox to its initial state.

Reproduction

StackBlitz reproduction:
👉 here