User Login page flagging for aria-label role issue "Grouped form controls missing an accessible name"

SiteImprove is flagging the user-login page (the one for user login in the site, not the admin login page) for “Grouped form controls missing an accessible name”. The site is on 3.1.1 using the default theme. Has anyone else run into this or know if updating to 3.1.2 will resolve the issue?