Hi,

Thank you for the response!

1) We suggest to not use Uncontrolled Select. We spend more time working on Controlled version and probably will not support Uncontrolled version in the future.

I tried to reproduce the behaviour with Controlled version(but it's a little bit different) and it works well :

import React, { Component } from 'react';
import { MDBSelect, MDBBtn } from 'mdbreact';

class Select extends Component {
  state = {
    value: { code: 'default', name: 'Default' },
    options: [
      { text: 'Default', value: '1', checked: false },
      { text: 'Big', value: '2', checked: false },
      { text: 'Small', value: '3', checked: false }
    ]
  };

  reset = () => {
    const options = [...this.state.options];

    options.map(option => {
      if (option.text === 'Default') {
        option.checked = true;
      } else {
        option.checked = false;
      }
      return option;
    });

    this.setState({ options });
  };

  render() {
    const { options } = this.state;
    return (
      <div>
        <MDBSelect color='primary' label='Example label' options={options} />
        <MDBBtn onClick={this.reset}>Reset to Default</MDBBtn>
      </div>
    );
  }
}

export default Select;

2) Yes, it's a bug. But it does not happen with Contollrolled Select.

3) It will be fixed as soon as possible!

We will look for errors in Uncontrolled versions but I can't promise it will be soon.

Due to the fact that Uncontrolled version will lose support in the future, I recommend using Controlled version.

Hope I could help.

Best regards.