Primefaces monitorDownload stop doesn't work when cookies HTTPOnly is enabled

I am using Primefaces 11.0.0 and I have a download file component as follows :

<p:commandButton 
    onclick="PrimeFaces.monitorDownload(startDownload, stopDownload);"
    ajax="false"
    icon="fa fa-download">
    <p:fileDownload value="#{downloadBean.getDownloadFile(document.id)}"/>
</p:commandButton>

My application is running on tomcat behind Nginx and we have a security recommendation to add HTTPOnly,Secure to our cookies so when configuring the HTTPOnly to cookies on Nginx the stopDownload is never get called.

My Nginx config is as follows:

location /myapp {
            proxy_pass http://localhost:8080;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto https;
            proxy_cookie_path /myapp "/myapp; HTTPOnly; Secure";
        }

How to make stopDownload works with HTTPOnly ?

EDIT:

I was able to make it work by setting HTTPOnly to important session cookies as follows :

proxy_cookie_flags ~ Secure;
proxy_cookie_flags JSESSIONID HTTPOnly Secure;

Is this is the best practice or there's a better solution ?