Syncronization problems with Calendar App in MacOS Catalina

[Hans-Christian Melzer]

Hello,
When I integrate the Team Calendar under MacOS Catalina in the Calendar App (CalDav), the colors I have set for different calendars in the app are lost with every sync.
The Nginx Proxy displays for example the following information:

PROPPATCH /plugins/servlet/team-calendars/caldav/xxxxx-e44c-482f-87d8-35fa5b072a2e/ HTTP/1.1" 405 40 "-" "Mac+OS+X/10.15.3 (19D76) CalendarAgent/930.2.3

my NGINX Config:

server { 
    listen 443 ssl; 
    server_name example.com; 
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2; 
    ssl_session_timeout 1d; 
    ssl_session_cache shared:SSL:50m;
    ssl_stapling on;
    ssl_stapling_verify on; 
    ssl on; 
    index index.html index.htm;
    try_files $uri $uri/ /index.html; 
    dav_access user:rw group:r all:r;
    dav_methods PUT DELETE MKCOL COPY MOVE;
    dav_ext_methods PROPFIND OPTIONS;
    location / {
        proxy_http_version 1.1;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_pass http://xxx.xx.0x.1:5556;
    }
}

Confluence Version: 7.3.1

Team Calendars: 6.0.47 

 Can anyone help me?

[wnck]

There is an atlassian jira ticket explaining the problem:

https://jira.atlassian.com/browse/CONFSERVER-59877

[Michael Greve]

i have the same problem since upgrading to catalina. macOS calendar also loses the checkboxes to select individual calendars. all calendars from confluence are displayed in black.