fixed regressions in the following PRs: 2215, 2205 and 2226

src/Select.js

@@ -122,9 +122,19 @@ class Select extends React.Component {
 			this.setState({ required: false });
 		}
 
-		if (this.state.inputValue && this.props.value !== nextProps.value && nextProps.onSelectResetsInput) {
-			this.setState({ inputValue: this.handleInputValueChange('') });
+		// Here we only want to clear the input value under the following conditions.
+		// 1. There currently actually is an inputValue in state
+		// 2. The new value is different to the old value OR the new value is == null
+		// 3. The new value is not the same as the last set value OR onSelectResetsInput has been enabled
+		if (this.state.inputValue
+			&& (this.props.value !== nextProps.value || !nextProps.value)
+			&& (nextProps.value !== this._lastSetValue || nextProps.onSelectResetsInput)) {
+			this.setState({
+				inputValue: this.handleInputValueChange('')
+			});
 		}
+
+		delete this._lastSetValue;
 	}
 
 	componentDidUpdate (prevProps, prevState) {
@@ -589,10 +599,11 @@ class Select extends React.Component {
 			const required = this.handleRequired(value, this.props.multi);
 			this.setState({ required });
 		}
+		if (this.props.simpleValue && value) {
+			value = this.props.multi ? value.map(i => i[this.props.valueKey]).join(this.props.delimiter) : value[this.props.valueKey];
+		}
+		this._lastSetValue = value;
 		if (this.props.onChange) {
-			if (this.props.simpleValue && value) {
-				value = this.props.multi ? value.map(i => i[this.props.valueKey]).join(this.props.delimiter) : value[this.props.valueKey];
-			}
 			this.props.onChange(value);
 		}
 	}
@@ -719,11 +730,14 @@ class Select extends React.Component {
 			.filter(option => !option.option.disabled);
 		this._scrollToFocusedOptionOnUpdate = true;
 		if (!this.state.isOpen) {
-			this.setState({
+			const newState = {
 				isOpen: true,
-				inputValue: '',
 				focusedOption: this._focusedOption || (options.length ? options[dir === 'next' ? 0 : options.length - 1].option : null)
-			});
+			};
+			if (!this.props.onSelectResetsInput) {
+				newState.inputValue = '';
+			}
+			this.setState(newState);
 			return;
 		}
 		if (!options.length) return;