If signing up via team invitation mail, we can't login Bitbucket Cloud with the password I set then

Summary

If signing up via team invitation mail, we can't login Bitbucket Cloud with the password I set then.

Steps to Reproduce

1. Try to add a person who doesn't have any BB account and Atlassian Account to a Team
2. Invitation mail is sent to the person
3. The person signs up via the mail
4. The person logs out from BB and id.atlassian.com
5. The person tries to login BB with the password which the person set in the signup process

Expected Results

The person should signup correctly.

Actual Results

The person couldn't login with the password.

Workaround

Reset the password via "Forgot your password?" link and try to login with the new password.