At https://flatpickr.js.org/plugins/#rangeplugin-beta, I see second attempt (meaning, after both start/end dates are set) to open calendar dropdown and selecting a date re-uses one of previously-selected start/end dates. The steps are:

1. Go to https://flatpickr.js.org/plugins/#rangeplugin-beta
2. Select "Date 1"
3. Select September 16th, 2019 - It set as the start date
4. Select September 20th, 2019 - It set as the end date and calendar dropdown closes
5. Select "Date 1" again
6. Select September 23th, 2019

Result: The calendar dropdown closes, and September 23th, 2019 is set as the end date and September 20th, 2019 becomes the start date.

Expected (probably as an optional behavior): September 23th, 2019 is set as the start date, and the calendar dropdown is kept open. User can select e.g. September 27th, 2019 as the end date without re-opening the calendar dropdown.

Your Environment

• flatpickr version used: 4.6.1
• Browser name and version: Chrmoe 77
• OS and version: MacOS 10.14.6