_reflectBackOn() {
    return !this.__isUpdatingRegionWhileFocused && super._reflectBackOn();
  }
Do not reflect back .formattedValue during typing (this normally wouldn't happen when
FormatMixin calls _calculateValues based on user input, but for LionInputTel we need to
call it on .activeRegion change)
@enhance FormatMixin
@returns {boolean}