Dropdown - TypeError: Cannot read property 'element' of null

[adaseven]

[ X] bug report
[ ] feature request
[ ] support request => Please do not submit support request here, instead see

Current behavior
Dropdown is defined as follows:

	let months = [
		{ label: 'Jan', value: 1 },
		{ label: 'Feb', value: 2 },
		{ label: 'March', value: 3 },
		{ label: 'April', value: 4 },
		{ label: 'May', value: 5 },
		{ label: 'Jun', value: 6 },
		{ label: 'Jul', value: 7 },
		{ label: 'Aug', value: 8 },
		{ label: 'Sep', value: 9 },
		{ label: 'Okt', value: 10 },
		{ label: 'Nov', value: 11 },
		{ label: 'Dez', value: 12 }
	];

				<Dropdown
					value={this.state.selectedMonth}
					options={months}
					onChange={(e) => this.setSelectedMonth(e.value)}
					style={{ marginLeft: '15px', marginRight: '20px' }}
				/>

If you change the selection in the dropdown, the following error occurs: see screenshot

• React version:
  16.2.0

• PrimeReact version:
  3.0.0

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]
  Chrome

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  all