The behavior now routes me to the root "/" layout. I'm able to work around this by grabbing router state by way of useRouterState and dump its respective state's pathname in. Here's an example of the workaround — <MenuItem /> is a lightweight wrapper around <Link/>.
The following used to work with to="."
<MenuItem
color="negative"
iconColor="negative"
iconName="Logout"
onClick={handleClosePopover}
search={(prev) => ({ ...prev, flow: { name: 'signout' } })}
to={state.location.pathname as LinkProps['to']}
>
Sign Out
</MenuItem>