Environment

Can be replicated using the example component found at https://blueprintjs.com/docs/#datetime2/date-input3. I'm using Firefox Developer Edition.

Steps to reproduce

1. Pick a date in the date picker.
2. In the text input, write an invalid date (can easily be done by deleting) and then write the original string again.
3. Blur the input.

Actual behavior

No date is highlighted in the date picker. Upon blurring the input (clicking elsewhere on the page), the textbox displays 'Invalid date'.

Expected behavior

The date should still be highlighted in the date picker, and when blurring the input, the date should not display as invalid.