I have eight servers with OVH, a single one of those doesn't have an rDNS entry for IPv6 (though it has one for IPv4).
I just opened a support ticket, but it's strange either way.
@benaryorg At one point OVH was simultaneously maintaining at least 4 different service control panels, depending on which service you have and how old it is, so this sounds extremely on-brand for OVH
@joepie91 I mean, depending on which server I want to manage I have to use either the Kimsufi, SoYouStart, or the new OVH panel, which I find kinda funny, however of the eight servers one is SYS, four are KS, and three are the new OVH one, and the error occurs only on one of the servers on the new OVH panel. I also have (AFAIK) servers in the same DC, plus that one is part of the newest batch I ordered.
I'm actually clueless on this one.
However I vaguely remember that on setup of one of the servers I tried to set an rDNS before the DNS was fully propagated so maybe there's some residue of that, but I can't for the life of me remember which server that was.