Webdav over ipv6 celluar

An ISP provided home network works fine with IPV6 over webdav and HTTPS. The problem happens when I’m outside and using celluar data. I’m trying to connect to my home share via webdav over ipv6 celluar but this never works. I tried another app with webdav support and it works fine so I can confirm that the problem comes from infuse itself. Any idea?

Any updates?