https://github.com/bitcoin/bitcoin/blob/d72758c3f6c34cd835f5de3efc230964f3b1ea56/src/torcontrol.cpp#L539

If a user is running Tor proxy outside localhost (perhaps on other host inside LAN or in containerised environment) , the automatic creation of onion services ends up creating an onion service listening to hardcored 127.0.0.1 address on the Tor proxy's host instead of the private address of the bitcoind – effectively running an empty onion service listening the Tor proxy's localhost.
LOCK(cs_addrName);
    return addrName;
}
void CNode::MaybeSetAddrName(const std::string& addrNameIn) {
    LOCK(cs_addrName);
    if (addrName.empty()) {
        addrName = addrNameIn;
    }
}
CService CNode::GetAddrLocal() const {
    LOCK(cs_addrLocal);
    return addrLocal;
}
void CNode::SetAddrLocal(const CService& addrLocalIn) {
    LOCK(cs_addrLocal);
    if (addrLocal.IsValid()) {
        error("Addr local already set for node: %i. Refusing to change from %s to %s", id, addrLocal.ToString(), addrLocalIn.ToString());
    } else {
        addrLocal = addrLocalIn;
    }
}
#undef X
#define X(name) stats.name = name
void CNode::copyStats(CNodeStats &stats, const std::vector<bool> &m_asmap)