Confluence password regex does not match the password regex set in Crowd

When using the "forgot password" link, users receive an error:
"An internal error occurred while generating your new password. This may be caused by password validation rules. Please contact your administrator."

After a few more attempts a password is generated and sent. We are using Crowd 2.3.3. It appears that Confluence's generated password does not meet the complexity requirement set in Crowd.