.arpa Web Adress not reachable

This is a first time issue report, if I've done something wrong or I'm even in the wrong category, feel free to forward or correct.

Dear Tor Project Team:

On https://1.6.0.0.8.0.0.b.e.d.0.a.2.ip6.arpa/ someone managed to set up a working fediverse instance on an .arpa address.

While I'm pretty sure that an .arpa adress is not intended for such "abuse", it somehow works.

Well, except over the tor network.

While not intended, their is now content which can't be accessed by an censorship circumvention tool.

The problem is not Tor Browser specific, it occurs also with other (Firefox based) Browser if using the Tor Network.

Is a security feature working against it? Or just a: this hasn't occurred until now?

Software: Tor Browser for Desktop Expected behavior: Reach the website Current behavior: Website cannot be reached Website: https://1.6.0.0.8.0.0.b.e.d.0.a.2.ip6.arpa/