Differences in the behavior of Tomcat's getRequestURL - tomcat8

Question

I found that javax.servlet.http.HttpServletRequest.getRequestURL() behaves differently in 8.5.57 and 8.5.58. If I add a RemoteIpFilter setting to application's web.xml, the 8.5.57 getRequestURL returned https, while 8.5.58 returned http.
The environment is Azure WebApps.
The settings for web.xml are as follows.
<filter>
<filter-name>RemoteIpFilter</filter-name>
<filter-class>org.apache.catalina.filters.RemoteIpFilter</filter-class>
<init-param>
<param-name>remoteIpHeader</param-name>
<param-value>x-forwarded-for</param-value>
</init-param>
<init-param>
<param-name>remoteIpProxiesHeader</param-name>
<param-value>x-forwarded-by</param-value>
</init-param>
<init-param>
<param-name>protocolHeader</param-name>
<param-value>x-forwarded-proto</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>RemoteIpFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
The same thing happened between 9.0.37 and 9.0.38.
I couldn't determine which content was affected by the change history, so please let me know.
Best regards.
2021/11/15 Added
I added the following logic to check.
response.setContentType("text/html");
PrintWriter out = response.getWriter();
Enumeration e = request.getHeaderNames();
while (e.hasMoreElements()) {
String name = (String)e.nextElement();
String value = request.getHeader(name);
out.println(name + " = " + value + "<br>");
}
The Key that the value was set to is as follows.
cache-control, connection, accept, accept-encoding, accept-language, cookie, host, max-forwards, user-agent, sec-ch-ua, sec-ch-ua-mobile, sec-ch-ua-platform, upgrade-insecure-requests, sec-fetch-site, sec-fetch-mode, sec-fetch-user, sec-fetch-dest, x-waws-unencoded-url, client-ip, x-arr-log-id, disguised-host, x-site-deployment-id, was-default-hostname, x-original-url, x-forwarded-for, x-arr-ssl, x-forwarded-proto, x-appservice-proto, x-forwarded-tlsversion