_reflectBackFormattedValueToUser() {
      if (this._reflectBackOn()) {
        // Text 'undefined' should not end up in <input>
        this.value = typeof this.formattedValue !== 'undefined' ? this.formattedValue : '';
        this.#viewValueState.didFormatterOutputSyncToView =
          Boolean(this.formattedValue) && this.#viewValueState.didFormatterRun;
      }
    }
Synchronization from `LionField.value` to `._inputNode.value`
- flow [1] will always be reflected back
- flow [2] will not be reflected back when this flow was triggered via
  `@user-input-changed` (this will happen later, when `formatOn` condition is met)
@protected