onSelect only called once when allowMultiSelect set to true

[andreirawan97]

Describe the bug
Just like the title, the onSelect prop only called once when allowMultiSelect set to true. While when set to false, the onSelect prop can call multiple times. I'm developing a double click node feature where it needs the onSelect prop to called multiple times.

To Reproduce
Steps to reproduce the behavior:

1. Set allowMultiSelect to true or just leave it as default
2. Multiple clicks on a node
3. onSelect only called once.

Expected behavior
onSelect called multiple times

Screenshots
No screenshot

Desktop (please complete the following information):

• OS: MacOS
• Browser Chrome
• Version 8.1.0

Additional context
Add any other context about the problem here.