How to fix uri for `http.server.requests` metric for /token endpoint of spring-authorization-server?

Question

I'm using Spring Authorization Server, and didn't notice that http.server.requests metric contains /oauth2/token uri tag.

But I've noticed during debugging of WebMvcMetricsFilter that the metric is actually counted, but the uri tag is root, because HttpServletRequest#getPathInfo returns null for requests on /oauth2/token

Why doesn't that work by defualt?

Also didn't notice anything about metrics in docs https://docs.spring.io/spring-authorization-server/reference/overview.html

Any idea how to fix uri tag for http.server.requests metric for standard /oauth2/token endpoint?