Date gets deselected in Calendar with selection mode range

[annadaresay]

I'm submitting a ...

[x] bug report
[ ] feature request
[ ] support request

Codesandbox case
https://codesandbox.io/s/primereact-test-forked-mgcsf

Current behavior
I use Calendar with selectionMode range. First I select date1, then date2. If date2 < date1, then date1 is deselected.

Expected behavior
I'm thinking order of dates shouldn't matter, when selecting a range, or is this expected behaviour? If so, a setting for this would be great!

Please tell us about your environment:

• React version:
  16.8.0

• PrimeReact version:
  6.0.1

• Browser:
  Chrome 93.0