As @Licaon_Kter correctly points out, carmel.qumran.org is the host of multiple web sites (on different domains) including my F-Droid repo, so there for sure will be https requests to its IP address if you have my repo configured. But there should be no requests to that host name (neither to qumran.org by this name), nor any using the insecure http (instead of https). No idea why this forum converts host names to http URLs (which is wrong in this case, as they shouldn’t be addressed this way).
On carmel, there’re my repos (F-Droid and Debian) as apt.izzysoft.de, there’s my business website www.izzysoft.de, there’s my eBook server ebooks.qumran.org, and several more websites. All using https of course.
Oh, reverse lookup will return carmel.qumran.org in all those cases as that’s the machine’s “real name” (as opposed to all the “virtual hosts” running on it).