Windows Console closed abnormally

**Describe the bug**
Pressing ctrl+c to exit is normal, but clicking the close button to exit will first block for 2 seconds before closing.
I have used https://github.com/cqroot/prompt and https://github.com/erikgeiser/promptkit. They have same problem.

**To Reproduce**
Open the program using the windows console.
Click close button.

**Screenshots**
https://pb.nopdan.com/7xZZ

Start by reproducing the behavior in a Windows console, comparing Ctrl+C with clicking the close button and measuring the reported two-second delay. Trace the console-exit handling from the program entry point; done means closing the console exits without the abnormal delay.

Written by the indexing model from the issue text.