Hi, thank you for your support.
Sorry for making you confused, this happens in all versions, not just in the latest version. Here are the settings of the element:
The problem is the option: “Move to other months”. If I don’t check that option, it will be like this: the date is from another month but it doesn’t move to that month when I open the calendar.

But if I check that option, I cannot choose dates from other months because it automatically toggles after I choose one date, while I want to pick a range. You can check it in this video: Issue.mov - Google Drive
If you need any more details, please reply.