MultiSelect triggers wrapping form

Environment

• Package version(s): select 3.15.0
• Operating System: Docker / node 14
• Browser name and version: Chrome latest

Code Sandbox

Link to a minimal repro (fork this code sandbox): https://codesandbox.io/s/blueprint-sandbox-forked-cnc83?file=/src/index.tsx

Steps to reproduce

1. Create a MultiSelect
2. Place it inside a form
3. Select a value, confirm with enter

Actual behavior

The form is submitted.

Expected behavior

The value is added to the tag list and the form remains un-submitted.

Possible solution

Doing event.stopPropagation and event.preventDefault in the onItemSelect handler does not help. Same with overriding tagInputProps.onChange.